I ditched that pos 305 and got with the big dogs 355 with flat top forged pistons cranks been turned 10 and bored 30 over and a little more stuff that i cant mention just incase some of my enemies are watching . Plus i dont need no one stealing my set up. (had it happen before) When you do the swap you should also get ready to swap out that trans like me im going with a t56 but for the moment i am running a 700r4 with a 3500 rpm stall. How much hp are you looking to make? Plus arent you on ls1tech?