Thread: For Don Shilady

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Originally Posted by Don Shillady

NTFDAY I need to chat with a builder of Gen1 SBC. Maybe they did not have a cam button but maybe that is why the later 350s did have one. Maybe there is a retrofit? The engine came from a 1976 Corvette as proved by the engine number.

Don Shillady
Retired Scientist/teen rodder

Don, your engine and mine are twins, so to speak, and neither require cam buttons. If you pull the distributor check both side to side and up and down movement. Too much up and down movement can be lessened by installing a shim or two. If you find, IMHO, over 1/8" side to side movement I'd be looking at a new distributor.
Hopefully Jerry Clayton or anyone else with considerable time building engines will chime in and offer other suggestions as I'm not an engine builder per se.
I believe that in the past you've been given some bad advice which has negatively effected your wallet.

Originally Posted by NTFDAY

Too much up and down movement can be lessened by installing a shim or two.

I'm sorry, I'm talking about a base shim, not internal. Base shims raise the distributor at it's base to add clearance at the oil pump.
https://www.speedwaymotors.com/Moros...yABEgKf1_D_BwE

Originally Posted by 36 sedan

I'm sorry, I'm talking about a base shim, not internal. Base shims raise the distributor at it's base to add clearance at the oil pump.
https://www.speedwaymotors.com/Moros...yABEgKf1_D_BwE

I know what you're talking about, not the same as what I was referring to. What I was referring to requires pulling the gear off, driving out the roll pin, and installing a shim or two. That will lessen the amount of movement of the rotor in reference to the cap.