1419Re: The '49-'62 V8... anything out there?
- Dec 11, 2004Jerry,
The '74-'76 500s have 120+ cc chambers and a very small dish. If the
bores look good, you could just deck the block for a .040" or so
assembled quench, and whack the heads to get to *maybe* 9.5-1. Fyi -
KB makes no dish flat tops for it if it needs bored [which I doubt it
Another option would be dished KB designed for the early heads. They
give 10-2-1 or so with the '68-'73 heads [76cc]. Another option is to
use 107cc 425 heads on your shortblock. They'll put you a little over
9.5-1. The 425 heads don't flow as well as yours, but a little work
and they'll do ok. The 76cc heads flow better than yours, btw, but
not much in stock form. More fyi - 2.11"/1.66&1.77" pontiac valves
fit the 107 and 120cc heads perfectly. For larger valves on the 76cc,
aftermarket valves are available from the caddy
> Nother question: Is it acceptable practice to mill the heads toraise
> compression a point to a point-and-a-half? If so do you have to goto
> different length pushrods or will there still be sufficientclearance
> between valves and piston? I'm looking for about 9.5:1 CR to helpout
> performance. I know the best way to go is usually different pistonsbut I'm
> trying to keep the costs reasonable.
> Thanks. You guys have been great with the information and advice.
> Jerry Brown
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