Edelbrock Automobile Accessories 262 400 User Manual

RPM AIR-GAP MANIFOLD  
CATALOG #7501  
MODEL: Chevrolet 262-400 c.i.d.V8, 1957 to 1986 Non-EGR  
INSTRUCTIONS  
• PLEASE study these instructions, and the General Instructions, carefully before installing your new manifold. If you have any  
questions or problems, do not hesitate to call our Technical Hotline at: 1-800-416-8628.  
• EGR SYSTEM: This manifold will not accept stock EGR (exhaust gas recirculation) equipment . EGR systems are used on some  
1972 and later model vehicles and only in some states. Check local laws for requirements. Not legal in California on pollution-  
controlled motor vehicles.  
• MANIFOLD: The Edelbrock RPM Air-Gap manifold has been designed for 262-400 c.i.d. small-block Chevrolet engines. The  
manifold accepts late model water neck, air conditioning, alternator and H.E.I. ignition systems. Use the recommended electric or  
manual type choke carburetors only. This manifold is recommended for street high performance and race vehicles only. The RPM  
Air-Gap manifold provides good low rpm response for street performance vehicles and increases performance above the 5000 rpm  
range. It also provides horsepower and torque increases, when used with any mix of aftermarket equipment available for vehicles oper-  
ating from 1500-6500 RPM.  
• ACCESSORIES & INSTALLATION ITEMS: Major recommendations are listed below. However, due to the variety of years, makes  
and models to be covered, please review each part listed in the Installation Items section of the Edelbrock catalog to decide whether  
more items are required for your specific vehicle than are mentioned in these instructions.  
• POWER PACKAGE: Edelbrock RPM Air-Gap manifolds are part of a total Power Package System that can be completed with the  
use of Edelbrock Performer RPM aluminum cylinder heads, dyno-matched Performer RPM camshaft #7102, springs, chain set,  
carburetors and related parts specifically designed to give you maximum results. Please refer to our catalog for details.  
• CARBURETOR RECOMMENDATIONS: If parts required for installation are unavailable locally, contact Edelbrock directly.  
A-Carburetor will work with non-EGR (Exhaust Gas Recirculation) or pre-emission control system.  
I-Carburetor has no provision for evaporative canister.  
K-Carburetor requires #8008 or #8024 stud, nut and washer kit. Determine length needed before installation.  
O-Carburetor has manual choke only.  
If electric choke is required use Edelbrock kit #1478.  
Note: Manifold has been tested and proved compatible with Holley 0-4779 (750 cfm).  
• BRACKETS  
1. Due to the design and leg configuration on the Edelbrock manifold, the throttle and kick-down bracket on some model vehicles  
requires modification to fit. If this condition occurs with your installation, you may purchase the Edelbrock mounting bracket #8036,  
or modify your bracket as shown in Figure 3.  
2. The carburetor location has been moved up by 0.7" and forward by 0.125" from the OEM location for maximum performance. If your  
throttle cable bracket fastens to the carburetor pad you won’t have a problem. If your bracket fastens to the back of the manifold use  
kit #8012. (To install #8012 properly, depress the throttle pedal fully, open the carburetor to WOT, and then install the #8012 extension  
to the carburetor). Failure to do this will prevent your throttle pedal from tripping the transmission sensor at WOT. This affects  
transmission kick-down and up-shift points resulting in reduced performance.  
• GASKETS AND SEALANT  
CAUTION: Do not use high performance or competition type intake gaskets for street application. Due to material deterioration under  
street driving conditions, internal leakage of both vacuum and oil may occur.  
1. Use only Edelbrock #7201, Fel-Pro #1205, or OE equivalent gasket set when installing Edelbrock manifolds for street applications.  
2. Apply Edelbrock Gasgacinch sealant, #9300, to both sides of the manifold as well as head surfaces. This procedure ensures a good  
seal.  
© 1998 Edelbrock Corp.  
12/98  
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GENERAL INSTRUCTIONS  
FOR INTAKE MANIFOLD  
REMOVAL AND INSTALLATION  
The following instructions must be carefully studied and understood before you remove your stock  
manifold. Failure to follow these instructions may void the warranty.  
NOTE: Included with your Edelbrock manifold package is a separate manifold instruction sheet. That instruction sheet lists carburetor  
selection, installation parts, modifications (if needed), and all technical specifications. This must be read carefully. If you have any  
questions please contact Edelbrock direct . See page #8.  
CAUTION: Improper installation will result in:  
Low Mileage  
Poor Performance  
Costly Re-Installation  
To avoid these problems, you must use the preliminary checklist printed below for your convenience.  
PRELIMINARY CHECK LIST:  
Carefully study and understand ALL instruction sheets.  
Carefully check the manifold instruction sheet to make sure it is the correct one.  
Inspect manifold for possible shipping damage (if damaged, contact your dealer immediately).  
Check all threaded holes.  
Check all internal passages with a light and a wire making sure they are clean and unobstructed.  
Use correct Edelbrock or OEM gaskets with Edelbrock Gasgacinch #9300 and RTV silicone sealant.  
Use Teflon tape or PST thread sealer on all pipe plugs, fittings and bolt threads.  
Remove dowel pins from end seal surface on Ford and Chrysler products. Use grip pliers for removal.  
Use correct carburetor and adapter if recommended. Always use a new carburetor base gasket.  
Re-install vacuum lines correctly and replace all bad lines with the correct size.  
Position manifold and follow torque sequence correctly as per instruction sheet.  
Set ignition timing to correct specification.  
Check carburetor, points, plugs, wires and distributor vacuum and mechanical advance systems to avoid possible  
problems in the future.  
Check automatic transmission shift points before removal of your stock manifold, and adjust linkage after Edelbrock  
manifold installation for same shift points (if needed).  
Check air/fuel ratio before and after new manifold installation.  
Check emission parts for proper function before removing stock manifold.  
Adjust the automatic choke correctly.  
NOTE: We recommend that you refer to this checklist again AFTER installation to be sure you have completed all steps.  
EDELBROCK WARRANTY  
It is the constant endeavor of the Edelbrock Corporation to give our customers the highest quality of performance products obtainable. Edelbrock  
warrants each new product to be free from defects in both workmanship and materials to a period of one year from date of purchase, provided  
that the product is properly installed and subjected to normal use and service and that the product is not modified or altered in any way unless  
specified by our instructions. Customers requiring warranty assistance should contact the dealer from whom they purchased the product. In  
turn, the dealer will contact Edelbrock, and we will determine the method of satisfying the warranty.  
Should Edelbrock determine that the product be returned to the factory, it should be accompanied by proof of purchase and a clear notation of  
the exact problem encountered. The product must be returned freight pre-paid. If a thorough inspection of the product by the factory indicates  
defects in workmanship or material, our sole obligation shall be to repair or replace the product. This warranty covers only the product itself and  
not the cost of installation or removal.  
EDELBROCK CORPORATION SHALL NOT BE LIABLE FOR ANY AND ALL CONSEQUENTIAL DAMAGES  
OCCASIONED BY THE BREACH OF ANY WRITTEN OR IMPLIED WARRANTY PERTAINING TO THIS SALE, IN  
EXCESS OF THE PURCHASE PRICE OF THE PRODUCT SOLD.  
© 2001 Edelbrock Corporation  
Brochure No. 63-0048  
Page 1 of 8  
Rev 1/02  
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HOOD CLEARANCE  
THINGS TO DO BEFORE YOU REMOVE THE STOCK  
MANIFOLD  
C
E
D
TOOLS AND EQUIPMENT:  
Use the following checklist for items needed:  
Box and open end wrenches  
Socket set  
B
A
FO  
R
W
ARD  
Distributor wrench  
Pliers (channel locks and hose clamp)  
Screw drivers (regular and Phillips)  
Torque wrench  
Fig. 2  
Hammer  
Gasket scraper or putty knife  
Timing light  
MANIFOLD AND CARBURETOR HEIGHT:  
1. Remove the air cleaner.  
HEIGHT B  
2. Lay a straightedge (such  
as a yardstick) across  
top of carburetor from  
front to back.  
3. Measure from block and  
manifold end seal  
surface.  
Vacuum gauge  
Rags  
Water bucket  
SHOPPING LIST:  
Gaskets-Edelbrock, OEM or OEM equivalent  
Pipe plugs, if needed  
Edelbrock Gasgacinch (#9300)  
RTV High Temp silicone sealer or O/2 sensor safe  
Masking tape  
Modeling clay or putty  
Chalk  
Paper and pencil  
Radiator coolant  
Vacuum gauge  
Teflon thread tape or PST thread sealer or equivalent  
Check manifold instruction sheet for catalog numbers of Edelbrock  
or OEM parts needed for your installation.  
FO  
R
W
ARD  
See Figure 3.  
4. Record measurements  
in blank spaces labeled  
OM1 and OM2.  
5. Measure height of  
carburetor and record in  
space C3.  
HEIGHT A  
Fig. 3  
NOTE: Most 4-bbl carburetors are about 3-1/4" tall (mounting  
flange to air cleaner flange).  
6. Place straightedge on top of new manifold including any adapters  
or gaskets you plan to use.  
7. Measure distance from end seal surface as you did on stock  
manifold. See Figure 4.  
8. Record measurements in spaces NM1 and NM2.  
9. Add carburetor measurement C3 to new manifold figures you  
recorded.  
CHECKING HOOD CLEARANCE:  
NOTE: Check hood clearance BEFORE removing stock  
manifold.  
1. Use modeling clay or putty and make five stools, two or three  
inches high.  
10. If the new combination is taller, subtract this amount from the hood  
clearance figure for the new hood clearance.  
CAUTION: You must maintain at least 1/2" clearance between  
the hood and air cleaner because of engine torque. If you have  
insufficient clearance, a low profile air cleaner may solve the  
problem.  
2. Position stools on air cleaner at front, rear, each side and on center  
stud. See Figure 1.  
3. Close hood to locked position and re-open.  
CLAY CONE  
AIR CLEANER  
NOTE: On engines without end seal surfaces, select a standard  
point from  
which to  
2-3"  
C
D
E
B
A
FO  
measure.  
R
W
ARD  
Fig. 1  
4. See Figure 2 and record measurements in blank spaces labeled A-  
B-C-D-E.  
5. These figures show the amount of clearance between the hood  
and the air cleaner.  
Fig. 4  
© 2001 Edelbrock Corporation  
Brochure No. 63-0048  
Page 2 of 8  
Rev 1/02  
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AIR CLEANER:  
Use stock air cleaners unless changing carburetor.  
BRACKETS:  
You may require some bracket parts or bracket modification when  
replacing a 2-bbl carburetor with a 4-bbl carburetor. Refer to the  
manifold instruction sheet for Edelbrock and OEM part numbers  
needed and drawings of possible parts modification.  
NOTE: If a new or replacement air cleaner is used, there may be  
inadequate hood clearance. Make sure it performs the same  
function as stock and meets legal emissions requirements.  
CLEAN ENGINE:  
1. We recommend cleaning engine to prevent dirt from falling into  
engine lifter valley or intake ports.  
2. Cover ignition system Use Gunk (or equivalent) and a brush to  
thoroughly clean manifold and the area between manifold and  
valve covers.  
AUTOMATIC TRANSMISSION CHECK:  
1. To assure best performance, economy and emissions, the shift  
point MUST be checked before and after the manifold change. We  
suggest this method. From a standing start in drive, PUSH THE  
THROTTLE WIDE OPEN. Hold in this position. Note speedometer  
M.P.H. when it makes the first shift. After new manifold  
installation, make the same test noting M.P.H. of the first shift.  
2. If adjustment is necessary and to avoid possible transmission  
damage, refer to manifold instruction sheet, your local dealer, a  
transmission shop, or automotive repair manual for the correct  
adjustment procedure.  
3. Rinse with water and blow dry.  
VACUUM LINES:  
1. Vacuum lines are a major source of manifold, carburetor, and  
ignition malfunction problems causing poor mileage, performance,  
and high emissions.  
CAUTION: It is very critical that the procedure outlined below  
be followed and completed with extreme care.  
2. Before removing stock manifold, you may either make a sketch or  
tag each vacuum line with masking tape showing where each line  
goes on the carburetor, manifold, distributor, transmission, all  
emission sensors and EGR valve.  
CHECKING EMISSION LEVELS:  
1. Where required by law, after making any equipment change to the  
engine package, it is the responsibility of the consumer to make  
certain all OEM emission equipment remains operational.  
2. Edelbrock recommends that tailpipe levels be measured before and  
after equipment installation. This procedure will provide guidelines  
for keeping vehicle emission levels within legal limits.  
3. Edelbrock cannot be responsible for vehicle emissions if all such  
devices are not re-connected.  
NOTE: You are dealing with two types of vacuum signals. No. 1  
is called Manifold Vacuum. No. 2 is called Timed Port Vacuum.  
Each has its particular function and must be connected correctly  
for proper engine, transmission, ignition, emission and accessory  
function. Use the following procedure to determine one from the  
other and note it on your sketch or tags.  
NOTE: If any emission part cannot be re-installed with your  
Edelbrock manifold, contact: Edelbrock Corporation.  
MANIFOLD VACUUM CHECK:  
1. Start the engine with vehicle out of gear, set the brake and block  
the wheels. Idle until engine is warm and the automatic choke is  
completely off.  
2. With engine at idle, place a vacuum gauge or your finger over the  
end of each line and check for vacuum. If it shows vacuum, note  
on your sketch or tag as “manifold vacuum”. As seen below.  
EGR SYSTEMS:  
Exhaust Gas Recirculation (EGR) systems are used on some 1972  
and later passenger cars, trucks and recreational vehicles. If your  
vehicle has an EGR system, law requires that you retain this  
system with your new Edelbrock manifold.  
TIMED PORT VACUUM CHECK:  
1. For lines not showing vacuum in the previous test, open throttle  
slowly to about 1500 rpm. If you now show some vacuum, note on  
tags or sketch as “timed port vacuum”.  
EXHAUST MANIFOLD HEAT RISER VALVE:  
1. If your vehicle is equipped with an exhaust manifold heat riser  
valve (generally located on the passenger side of vehicle below the  
exhaust manifold), check the valve for proper operation.  
2. This valve is spring-loaded and must work freely from the close to  
open position by hand.  
3. After engine warm up, the bi-metal spring must keep the valve in  
the open position. If the valve does not open or opens only part  
way, excessive exhaust heat will transfer through intake manifold,  
causing damage to the manifold.  
CAUTION: Vacuum line fatigue is common. It is wise, at this  
time, to replace all vacuum lines, making sure you use the correct  
size.  
NOTE: Remember all lines must be re-connected to their proper  
vacuum source.  
AUTOMATIC CHOKE:  
1. With engine cold and not running, remove air cleaner and open  
throttle by hand. This will allow the choke blade to close.  
2. By hand, feel how much tension is holding the blade closed.  
Preliminary setting should be the same AFTER manifold  
installation. See choke section on later pages.  
© 2001 Edelbrock Corporation  
Brochure No. 63-0048  
Page 3 of 8  
Rev 1/02  
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REMOVING THE STOCK MANIFOLD:  
1. Disconnect battery.  
INSTALLING YOUR EDELBROCK MANIFOLD  
PORT SURFACE CLEANING:  
2. For ease of installation, keep all parts in some sort of order.  
WARNING: Do not remove manifold if engine is hot.  
3. Drain radiator coolant (drain plug will normally be located on lower  
right facing engine).  
NOTE: See individual manifold installation sheet for water  
draining requirement. Some engines do not require draining, such  
as Cadillac, 383-440 Chryslers, 351-C and 351-M Fords.  
4. Remove gas cap to relieve pressure. Disconnect fuel line and plug.  
Replace gas cap.  
See Figure 6. To prevent gasket pieces from falling into ports and  
combustion chambers when cleaning old gaskets from head  
surfaces, lay rags in lifter galley and stuff paper or rags into ports.  
When clean, remove stuffing carefully making sure all particles fall  
on rags in lifter galley. Carefully remove rags containing particles.  
Wipe surfaces clean with rags using lacquer thinner to remove  
any oil or grease.  
NOTE: This is a MUST to ensure proper sealing.  
5. Disconnect all linkage from carburetor such as throttle, throttle  
springs, transmission, cruise control and automatic choke.  
6. Tag and remove coil wires and sensor wires.  
7. Remove previously marked vacuum lines.  
8. Remove radiator hose, thermostat housing and thermostat, if  
mounted on manifold.  
10. Remove all brackets that are on the manifold.  
11. Loosen or remove valve cover bolts on valve covers for manifold  
removal and replacement. It may be necessary to replace valve  
cover gaskets, if broken, to prevent oil leakage.  
REMOVING IGNITION:  
CAUTION: Follow instructions carefully, as serious damage can  
occur when ignition is not installed correctly.  
1. Remove distributor cap.  
2. Note position of rotor and make a mark on the distributor case in  
line with the rotor point.  
3. Note position of distributor vacuum canister and place one type of  
mark on valve cover or firewall in line with the vacuum outlet.  
4. Note position of points (or magnetic trigger wheel), if open, how  
much; if closed, note the distance from point block to cam lobe.  
5. See Figure 5 for all details.  
Figure 6  
INSTALLING FITTINGS, PIPE PLUGS & STUDS:  
1. Do not over-tighten or cross-thread fittings, pipe plugs, studs or  
bolts in your aluminum manifold. Damage to threads or a cracked  
mounting boss may result unless caution is used when installing  
accessories.  
2. Use Teflon tape or PST thread sealer or equivalent. Install fittings,  
pipe plugs and carburetor studs from your stock manifold.  
6. Remove distributor.  
7. Do not rotate engine after removing distributor.  
GASKET SURFACE PREPARATION:  
CAUTION: Always use new gaskets as recommended. Check  
with gasket manufacturer for compatibility with aluminum intake  
manifolds. We recommend Fel-Pro Printoseal gaskets. The use of  
Permatorque gaskets can lead to improper sealing due to the  
hardness of the gasket. Don’t USE Permatorque gaskets.  
1. Check gaskets on head surface and manifold to make sure they  
are correct. Beaded side faces up.  
NOTE: In some cases there may be a right and left side gasket  
difference. Be sure they are placed correctly.  
2. Coat head surface and cylinder head side of intake gaskets with  
Edelbrock Gasgacinch #9300. See Figure 7.  
Figure 5  
Figure 7.  
DOWEL PIN REMOVAL:  
WARNING: On most Chrysler and Ford engines, there are dowel  
pins in the front and rear valley seal surfaces. These dowel pins  
MUST be removed. Edelbrock manifolds are not drilled for dowel  
pins and will not seal if they are not removed. Damage may result.  
PREPARATION PROCEDURE FOR  
© 2001 Edelbrock Corporation  
Brochure No. 63-0048  
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3. Within a few minutes gaskets and surface will become tacky to the  
touch. Carefully place gaskets on head surface, aligning ports and  
bolt holes.  
THERMOSTAT:  
1. To ensure proper function of your thermostat, place it in a pan of  
boiling water. It should open quickly to the wide open position. If  
questionable, replace it with one for the correct year and model of  
your vehicle.  
2. Install thermostat with proper orientation. Apply Edelbrock RTV  
silicone on manifold surface using a new gasket and place it in  
position aligning holes. Apply RTV silicone to water neck surface  
and bolt threads. Position water neck. Start bolts by hand and  
tighten.  
4. With Gasket in place apply a small amount of RTV High Temp  
silicone sealer around water passages intake manifold side. See  
Figure 8.  
Figure 8  
3. Make sure radiator drain is closed. Replace coolant.  
4. Re-connect battery.  
INSTALL IGNITION:  
1. Manifold must be in place and torqued to specifications.  
2. Install distributor with rotor pointing to your mark on the housing  
and the vacuum can lined up with your mark on the firewall or  
valve cover. See Figure 10.  
3. Make sure the distributor is all the way down and ignition shaft is  
fully engaged in oil pump drive.  
4. Rotate distributor until point opening or magnetic trigger wheel  
alignment is the same as when you removed the ignition.  
5. Install hold down clamp and tighten to hold in place.  
6. Final setting to specifications must be made with a timing light.  
5.. With Edelbrock manifolds, you must use RTV High Temp silicone  
sealer instead of end seal gaskets. Apply a 1/4" thick ribbon of  
sealant across each end seal surface. Some installation require  
02 sensor safe silicone See Figure 9.  
Figure 9  
RE-TIMING ENGINE:  
NOTE: If for some reason engine was rotated, the engine must  
be re-timed. Use the following procedure for re-timing the engine.  
1. Remove spark plug from No. 1 cylinder. See individual manifold  
instruction sheet for No. 1 cylinder.  
2. Remove coil wire from distributor and ground it.  
3. THIS STEP REQUIRES TWO PEOPLE OR A  
REMOTE STARTER SWITCH. One person rotates engine  
by slowly bumping starter. One person holds his finger over the  
No. 1 plug hole until compression is felt.  
4. Continue to bump starter until timing mark on the crankshaft  
pulley shows approximately 5 degrees before top dead center.  
5. See Figure 10 for correct positioning of rotor and ignition on No. 1  
cylinder.  
MANIFOLD INSTALLATION:  
1. Carefully position manifold on engine, centering bolt holes with  
bolt holes in head.  
NOTE: On some Ford and Pontiac manifolds, study manifold  
instruction sheet for special instructions.  
2. Refer to manifold instruction sheet for placement of any special  
bolts furnished with your manifold.  
3. Apply RTV silicone or Teflon tape to bolt threads, where exposed to  
water, oil or engine vacuum..  
Figure 10  
4. Start all bolts by hand. Refer to individual manifold instructions for  
torque sequence.  
CARBURETOR INSTALLATION:  
CAUTION: Use only recommended carburetors listed on manifold  
instruction sheet. You MUST use a new base gasket. For non-OEM  
carburetor, install according to manufacturer’s instructions. Use  
gaskets furnished with carburetor.  
1. Connect all fuel lines, linkage and throttle springs.  
2. Connect all vacuum lines. Refer to your drawing or tags for  
correct placement.  
WIRING  
Connect all electrical wiring as per drawings or tags.  
© 2001 Edelbrock Corporation  
Brochure No. 63-0048  
Page 5 of 8  
Rev 1/02  
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SETTING THE ELECTRIC CHOKE:  
6. Disregard previous mark placed on distributor.  
7. Install distributor so that rotor lines up with new mark and points  
are just open or magnetic trigger wheel aligns with sensor.  
8. Final setting to factory specifications is made with a timing light.  
NOTE: Rotate distributor opposite direction of rotor rotation to  
advance timing. Rotate with rotor rotation to retard timing. If  
these instructions are followed carefully, the engine should start  
and not backfire after the manifold installation.  
1. There will be an index mark on the choke cap and there will be  
adjustment notches on the choke cap housing. For initial setting  
make sure index mark is in the center of the adjustment notches.  
See Figure 11.  
2. Final setting will depend on climate conditions for your area. Cap  
indicates directions for richer or leaner choke setting.  
DIVORCED CHOKES:  
AUTOMATIC CHOKE:  
CAUTION: Improper or careless setting of the automatic choke will  
cause poor mileage and poor performance. Follow detailed  
instructions carefully.  
NOTE: Where design permits, Edelbrock duplicates the stock  
manifold choke mounting configuration. For applications where  
this is not possible, due to carburetor selection or manifold design,  
Edelbrock has incorporated on the manifold a special heat pad,  
which will allow the automatic choke function to be retained under  
the following situations.  
STOCK ELECTRIC CHOKE:  
1. When installing your OEM electric choke carburetor, re-connect  
choke wire as removed. DO NOT USE COIL WIRE  
1. Carburetor choke linkage determines choke blade opening by  
pushing up or pulling down.  
2. When replacing OEM electric choke carburetor with an Edelbrock  
electric choke carburetor, connect the choke wire to the choke cap  
terminal marked “+”. In some cases the wiper or heater motor .  
NOTE: Be sure the other connector is connected to a good  
ground. See Figure 11.  
2. Chevrolets may use the stock assembly unless carburetor  
selection requires a different choke opening direction.  
3. Thermostat assembly (GM part no. 3973497 for chokes which  
open with an upward motion, or GM part no. 3989058 for chokes  
which open with a downward motion) and dust cover (GM part no.  
14006795 for both applications) may be purchased from your  
Chevrolet dealer. NAPA #2-313 or equivalent may also be used in  
place of GM #3973497.  
4. These same assemblies may be used on most Edelbrock manifolds  
for GM engines, although the choke rod must be fabricated for  
non-Chevrolet applications.  
5. Check Edelbrock choke rod numbers below. These are available  
from Edelbrock dealers or from Edelbrock directly, if unavailable  
locally.  
CHOKE RODS:  
9171 - 4-V Rochester divorced choke rod for small-block  
Chevrolets (Performer 2101, 3701).  
9179 - 4-V Rochester divorced choke rod for big-block Chevrolets  
(Performer 2161, 3761).  
SETTING DIVORCED CHOKE:  
1. Install correct thermostat on manifold.  
2. Refer to individual manifold instruction sheet for Edelbrock choke  
rod part number and choke.  
Figure 11  
3. Choke must be set with engine cold.  
CONVERTING TO ELECTRIC CHOKE:  
CAUTION: Electric chokes will not function properly on less  
than 12 volts.  
4. Be sure carburetor and thermostat are securely bolted in place.  
5. Insert plain end of Edelbrock choke rod in rolled eye of spring and  
clip end in carburetor linkage. See Figure 12.  
1. Turn the ignition key on the running position. Use a volt meter and  
locate a +12 Volt source. ( Not the coil) For example, the input side  
of the resistor, a fuse panel terminal or any common +12 Volt  
terminal that has power only when the ignition switch is “on”.  
NOTE: Be sure your source is +12 Volts, and only when the  
ignition switch is in the “Run” position.  
6. Open throttle by hand and push on choke blade. By bending link,  
adjust to the same pre-load condition that you felt with the stock  
manifold. See Figure 12.  
7. When pre-load is set, remove link from carburetor end. Slide cover  
over link to base. Push down on cover until it snaps in place. See  
Figure 12.  
2. Do not use the plus side of the coil. This terminal is only 8 or 9  
volts and will not operate the choke.  
3. Follow carburetor manufacturer’s instructions.  
8. Replace clip end carburetor linkage and install clip furnished. See  
Figure 12.  
9. Open throttle by hand and work choke linkage by hand. Choke  
should work freely from closed to open position. If there is any  
bind, check cover for rod clearance and re-shape rod to clear.  
© 2001 Edelbrock Corporation  
Brochure No. 63-0048  
Page 6 of 8  
Rev 1/02  
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FOULED PLUGS AND OIL LEAKS:  
1. Failure to re-torque manifold.  
2. Incorrect manifold gaskets and sealant.  
3. Faulty PCV valve or use of incorrect PCV valve.  
4. End seal slippage or failure to use enough RTV sealant in place of  
end seals.  
AUTOMATIC CHOKE PROBLEMS:  
Failure to follow instructions completely or clogged exhaust  
crossover passages.  
POOR MILEAGE AND/OR PERFORMANCE:  
1. Incorrect selection of manifold for engine application.  
2. In correct carburetor choice.  
3. Re-curving distributor curves when not recommended.  
4. Incorrect automatic choke setting.  
Figure 12  
5. Failure to adjust automatic transmission shift point per  
instructions, if necessary.  
TROUBLESHOOTING:  
6. Improper vacuum hose installation (leaking).  
7. Failure to set timing to specification with timing light.  
8. Failure to replace plugs, wires, points and/or rebuild carburetor if  
necessary.  
Below is a list of the most common problems experienced after a  
manifold installation. Under each problem, we have listed several  
possible causes for the problem.  
WATER LEAKS:  
1. Failure to use new or current gaskets and proper sealant.  
9. Restricted air flow due to dirty air cleaner elements.  
MILEAGE TIPS:  
CAUTION:  
1. Due to varied conditions, such as weather, traffic and types of  
driving, average mileage should be computed with a minimum of  
4 to 5 tanks of gasoline.  
1. Fel-Pro brand Permatorque gaskets are not recommended for use  
with aluminum intake manifolds. Fel-Pro Printoseal gaskets are  
recommended.  
2. Install a vacuum gauge and program your driving habits to keep  
the vacuum as high as possible at all times.  
3. Keep tires inflated to highest pressure recommended by  
manufacturer.  
4. Keep air filter clean and replace when needed.  
5. Re-adjust automatic choke for winter and summer.  
6. Use light throttle when accelerating.  
7. Keep points and timing to maximum factory setting at all times.  
8. Check spark plugs and ignition wires at least every 10,000 miles  
and replace if questionable.  
2. Failure to use Teflon tape, pipe dope or liquid Teflon on fitting and  
bolt threads as recommended.  
3. Failure to replace questionable hoses or clamps.  
4. Use of chrome thermostat housing.  
VACUUM LEAKS:  
1. Failure to replace questionable hoses.  
2. Incorrect re-connection of vacuum hoses.  
3. Forgetting to connect a hose.  
4. Incorrect manifold gaskets or carburetor gaskets. Do not use Fel-  
Pro Permatorque gaskets for any aluminum intake manifold. Use  
the correct Edelbrock, OEM replacement, or Fel-Pro Printoseal  
gaskets.  
5. Failure to use Edelbrock carburetor spacer plates when  
recommended.  
9. Using a vacuum gauge, keep carburetor adjusted to highest idle  
vacuum.  
NOTE: For automatic transmission cars, adjust idle in gear. Idle  
adjustments must be made at the manufacturer’s  
specified rpm.  
6. Failure to re-torque manifold.  
© 2001 Edelbrock Corporation  
Brochure No. 63-0048  
Page 7 of 8  
Rev 1/02  
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Edelbrock replacement manifolds are designed to maintain high vacuum at cruise throttle position and sharp throttle response with minimum throttle  
opening. Unnecessary demands on the added performance will affect mileage.  
REFERENCE SYMBOLS & NOMENCLATURE  
MANIFOLD INSTALLATION AND  
CARBURETOR SELECTION SIMPLIFIED  
To simplify the selection of all parts necessary for a complete intake manifold selection, Edelbrock has developed a system which includes packaged  
accessory pieces intended to allow “one stop” shopping for manifold installations. Under each listed manifold there is a coding. These letters refer to  
the “symbol nomenclature” listed on this page and in the Edelbrock catalog. This nomenclature gives specific information about what parts will be  
needed for each Edelbrock manifold installation. Specific carburetor features are also identified, especially with regard to OEM emissions equipment.  
SYMBOL NOMENCLATURE:  
A. Carb will work with non-EGR or pre-emission control system.  
B. Carb will work with EGR systems.  
C. Adapter for this Carb supplied with this manifold.  
D. No Carb lever for the auto. trans. kickdown rod.  
F. Use manifold-to-manifold base gasket same year/model as vehicle, unless base gasket supplied with Carb.  
H. Carb has provision for evaporative canister.  
I. Carb has no provision for evaporative canister.  
J. Do not use Ford variable venturi OEM 2-bbl. Carb.  
K. Carb requires stud, nut, and washer kit #8008 (5/16-18 x 1-3/8") or #8024 (5/16-18 x 1-3/4"). Determine length needed before installing.  
L. Carb requires #8003 (1/4" rod extension), #8004 (5/16" rod extension), or #8022 (cable extension) for Chrysler auto.trans. Determine size  
needed before installing.  
M. Ford EGR adapter needed.  
N. Carb will accept factory cruise control.  
O. Carb has manual choke only  
P. Carb is NOT a stock replacement part.  
Edelbrock Corporation.  
2700 California Street • Torrance, California 90503  
IF YOU HAVE ANY QUESTIONS REGARDING THIS PRODUCT OR INSTALLATION,  
PLEASE CONTACT OUR TECHNICAL DEPARTMENT  
From 7:00 am To 5:00 pm, PST, Monday through Friday at:  
Edelbrock Corporation. 2700 California Street, Torrance, CA 90503  
Tech Telephone Number: (800) 416-8628 or (310)-782-2900  
Tech department Fax (310)-972-2730  
© 2001 Edelbrock Corporation  
Brochure No. 63-0048  
Page 8 of 8  
Rev 1/02  
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