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Originally Posted by Rev
When I ran 351W heads, 59.5 cc's, pistons down 0-.005" in the bore with 2.7cc valve reliefs and .049" compressed gasket we figured 9.5/1 CR. That's with 4.030" bore and a 302 crank. Hope that helps a little.
Rev
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Thanks for that info. it does help, Ronnie