I also wanted to fit the 1500's cams and valves like Foufoutos did but my mech said why don't I just fit the 1500's complete head. I guess that does make sense, the whole head would probably flow better than the 1300's head, but I am wondering if the compression ratio will still be the same...I think it should but any one here have any idea? I think the pockets in the turbo pistons is probably what the determines the compression I just hope its not in the head as well. Any ideas?