that is really beautiful, i know you are sobbing (or at least your bank account is) but you will come to realize it was all worth it when you drive that beast because you really cant put a price on happiness and judging by all the work you put into that...you will probably be euphoric. Im sure that if your dad could see what you are doing, he'd be happy, and soon you will be thanking him.
ps: i really like those pistons, what kind are those?