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Just went out and measured with a straight edge and feeler guages and came up with .015-.016 down for the pistons. I'm on the phone now with Summit and it seems Edelbrock has a 75cc RPM head listed. If I can get these heads then I'll be right at 10.7 with the edelbrock .038 gasket.



Im not aware of any 75cc RPM.s stock, they have tobe milled about .050 to be around 75cc.

I think the victors are 75cc.

If there are new 75cc RPM heads, thats news to me.