[Franks 72]

Had a closer look at the head of valve , it is quite burred and I am concerned it may not be square to valve as a result of me running it with the rocket off to the side. I have decided to remove the heads and revert back to original style heads (smaller hole). My son will inherit this truck and I don't want something "custom" that has a unique mixture of parts in it (tying him to an engine builder or specialist" . Just walk up to the parts counter and specify 1972 GM .Thanks to all who helped with this issue.