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Old 12-12-2012, 12:09 AM
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Use these pistons....
Speed-Pro Digital Diamond Profile (DDP) Hypereutectic Pistons ZWH345ACP30 -
With these heads....
Summit RacingŪ Cast Iron Cylinder Heads for Small Chevy SUM-152123 -
These heads will have springs installed to accomodate the lift of the Thumpr cam. In the long run, they'll be cheaper and work better than those fosdick production heads.
This cam...
12-600-4 - Thumpr
Intake valve closes at 35.5 degrees ABDC @0.050" tappet lift.
This intake manifold...
Edelbrock Performer RPM Intake Manifolds 7104 -
This carburetor...
Summit RacingŪ Remanufactured Quadrajet Carburetors SUM-210216 -

Align-bore or align-hone the main bearing bores to insure that all main bearings are round and parallel. Cut the block decks to square and for zero deck. Bore and hone the cylinders with a torque plate bolted to the block.

Use long-tube headers, 1 5/8" primaries, X or H tube before the mufflers.
Use 4" x 14" air cleaner assembly
This will make a 9.5:1 static compression ratio motor that generates a 8.35:1 dynamic compression ratio that will operate on pump gas. Use 16 degrees initial spark lead at the crank. Re-curve the dizzy for another 18 degrees of lead in the weights, all in by 2800.

Use a remanufactured harmonic damper from these guys...
Damper Doctor Online - Your source for Harmonic Balancers, Motor Mounts, & Drive Shaft Supports

Last edited by techinspector1; 12-12-2012 at 12:18 AM.
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