Goin NA. Tryed callin JE(THEY SUCK) The guy said whats the part number and without that he couldnt help. The guy I got the pistons block and rods from said his head was shaved and he was running 13;1 which mine is not shaved. The one im gettin the head from hadthe ecu programed for 12;1. By the way I really appreciate the advice.