Originally Posted by bowler

i have a 434" SBC with 14.8 to 1 and AFR 227 ported heads (58cc) car & driver 2420#, if i go to AFR 245cc heads (70cc) and .039 head gasket i will be at 13.3 to 1, my car ran [email protected] on a 4ths. pro tree deep staging, what i would like to know will i lose et? thanks for you help Doug