Quote:
Originally Posted by Tom Vaught
1) sorry for the confusion, Bill. Would you agree that the 455 SD Block has a larger distributor hole machined into the block and you need a distributor housing "sleeve" to run a conventional Distributor Gear and Conventional Camshaft? Not a Pontiac SD Expert by any means like Tom S, but assumed that the 455 SD camshaft and the 455 SD Distributor Gear were a matched set. And I assumed that when I wrote the post that Pontiac Engineers put a different configuration (sized) gear on both the distributor and the camshaft to handle the higher pressure 455 SD Pump.
What am I missing here? Why recast a new Pontiac block with a different distributor installation hole size for no reason?
Tom V.
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I'm the dummy here. Just trying to learn. Seems to me that if you made the distributor gear larger, you'd have to make the cam gear larger to keep the 1:1 ratio required of the gears (same number of teeth on both).