EH...I was wondering if there is any different between a B16A1 Head and a B17A head... are the cam shafts any different ??? Well I own a B16A1, and I got a B17A head for free, I wanted to swap the heads cause the B17A head has been port polish, but what I wanna noe is if it will perform different from my previous head?? will it still rev to 9000rpms??? please leave info or links, thanks, Fishman