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I know that the 393 stroker windsors use 302 pistons and that flat tops give you pretty high compression. if i have a set of pistons that will give 9.0:1 compression in a 302 with 58cc heads, what will they give me in a 393w stroker with 64cc heads?
 

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If two trains leave the station traveling...oops, wrong assignment. If you have a 302 piston that will yield 9.1:1 with 58cc heads it has to have a 12cc dish. That same piston in a 393 with 64cc heads will yield a 10.5:1 ratio. (Assuming zero deck and an .040 compressed gasket thickness...
 
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