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• INSTALLING DISTRIBUTOR AND TIMING ENGINE
NOTE: Before installing your distributor, check the gear drive on the distributor and oil pump for any signs of wear. If worn, be sure to replace with
new or you may wear out your camshaft prematurely. This is especially true when rebuilding your engine and a high performance oil system is
used, which generates a heavier load on the camshaft gear system. Edelbrock camshafts are designed to use OEM-type gears only.
1. Turn the engine over in the direction of rotation until the No. 1 intake valve closes and continue until the pointer on the front cover is approximate-
ly 5 degrees BTDC.
2. Re-install the distributor with the rotor pointing towards No. 1 terminal in the cap, and with the vacuum advance canister in its original position.
3. Lightly tighten the hold-down clamp so that the distributor can still be turned to determine final setting using a timing light with the engine run-
ning.
4. Replace valve covers, carburetor linkage and remaining vacuum and electrical connections.
5. Re-install air conditioner, if so equipped.
6. Refill radiator with coolant and re-connect battery.
7. Double check all connections, fuel lines, etc. before starting engine.
• CAMSHAFT/LIFTER RUN-IN
CAUTION: Change the engine oil and filter before start-up and again after initial break-in. Do not allow the engine to run under 2000 rpm for the
first half-hour. Vary engine speed between 2000 and 2500 rpm. Slow idle speeds may result in severe cam and lifter wear.
1. Start the engine and bring to break-in rpm.
IMPORTANT INSTRUCTIONS AFFECTING YOUR WARRANTY
• CAM LOBE WEAR- Cam lobe wear is almost non-existent unless mismatched parts are used or installation of the cam and lifters is done improp-
erly. Most cam damage is caused by the timing gear coming loose due to improper torque on bolt. Bolts holding gear to camshaft should be
torqued carefully and a locking compound applied to threads of bolts.
• CAM GEARS AND CAMSHAFT END PLAY- If cam gear becomes loose, the cam will slide back in the block, causing the lifters to hit the lobes next
to them and also the cam bearing journals. If the engine is run after this happens, the bottom of the lifters and the sides of the lobes will become
clipped.
When installing a camshaft, it is always important to check for proper operating clearances, especially when high performance components are
used. Things to look for that can cause failure and damaged parts are as follows:
1. Improper valve-to-piston clearance (this should be no less than 0.080").
2. Rocker arm stud slot clearance (both ends; valve closed and open).
3. Proper spring settings (see dimensions with spring instruction sheet; correct dimensions mean maximum performance and longer engine life).
• SPECIAL INSTRUCTIONS
With the Edelbrock manifold and camshaft package plus a header installation, a carburetor jet change may be required for best performance. Due
to the varied applications of year and model of vehicles, no one combination could suffice for all installations. The following procedure is only a
guideline and in many cases, the manufacturing specifications for recommended carburetors or timing may be best.
• IGNITION TIMING
Ignition timing for this package may vary with each application. A good starting figure would be between 10 degrees to 14 degrees initial timing
at idle with vacuum advance disconnected. Total advance should not exceed 32 degrees to 34 degrees with initial and centrifugal weights com-
bined and should be at full advance at 3000-3500 rpm. After timing is adjusted, re-connect the vacuum advance line. NOTE: The best combina-
tion for any particular vehicle or application must be determined by trial and error using the above information as a guideline.
• HEADERS
For best performance, headers are recommended. For this application, they should be 1-3/4" diameter, approximately 31" long and terminating
into a 3" collector. The remainder of the exhaust system should consist of dual exhaust and tail pipes, at least 2" diameter with low back-pres-
sure mufflers.
©2008 Edelbrock Corp
Rev 9/08 - AJ/mc
Brochure #63-5002
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