brian i wasnt saying you where wrong... i agree with you and i know you have to match everything. i know its a complete assembly that every part has to work together.. its just the way you come across (at least to me). i would just maybe point the guy in the right direction than just stamping his engine build with big "WRONG" and toss it to they side. why not direct him in the right direction so he can maybe get the best possible head with those pistons?? what head would you put with those pistons??