Why would you pick pistons without knowing what head cc you were going to run??

I think 9.5 DCR will be too much for 93 octane.

91 seems to need very low 8 or very high 7's DCR.

Youre gonna be stuck with an open X head just for compression reasons. I see your calca all use .051 head gaskets. Sound like your realizing the corner you've painted yourself in.

Last edited by autoxcuda; 10/14/17 10:49 PM.