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Mpar65, FWIW, Scott did a CR calcutaion with my pistons sitting .010 in the hole, a 039 head gasket, and figured a 74 CC chamber and came up with 11.09-1. When we actually milled the heads they cc'd at 64.6 cc's and he racalculated and we now have 12.05-1.

I'm not sure how my Pro Tru pistons compare with yours as far as vavle releif volume but I would think your problably in the 11-1 range.



thanks for the info bill. that would be cool if i had 11-1. but i wonder if that is to much for 93 pump gas? I am thinking about trying E85 this year? your car sounds like it will be a fun ride. what et are you shooting for? I hope to get mine to run 10.50 in the 1/4 and dive it on the street once in a while.best of luck Mopar65

3520 pound race ready 1973 Street/Strip Dodge Dart - Stock stroke 440/727 10.49 @ 125.0 on 93 pump gas & ET Street Radials. More to come... ( SGT Miller) Proudly served 12 years in the US ARMY RESERVES support our troops