WE just removed the Small block from the 63 pickup. When we pulled the heads off i noticed it has a 4 inch bore, so im guessing it is a 350. It is an original engine and hasn't been rebuilt. I have a 350 bored .040 over, with a 280 comp cam, and 305 heads. It leaks oil due to a groove in the crankshaft. Should i put this motor in, or rebuild the 350 that has never been rebuilt? ALso, how can i tell what year engine it is. THanks
