head casting# 3927763. I think 230 piston has no D shape. now have 73 PU 250 head 331184 block 328575 should be nolead.car is 63 nova conv. driver/cruiser. I have headers, 2rochesters&intake. now need to rebuild engine.whitch block {stock} and head do I use? what cam ? and what work on the head do i do. drive good tires talk
