i am trying to figure out what engine came out of my truck. when i bought the truck (74 F250 4wd) i was told the motor was a 390. i actually ran into the original owner and he said the guy he sold it to put a 428 in it. i ran the casting numbers off the heads (c7ae a) and the intake (d4te 9425 cb). both are from 390's i believe. but i can't find any numbers on the block. there is no 352 on the lh front of the block and there are indents/holes in the side of the block like where a side oiler cross bolts would go. my 428cj has the holes in the same place. where are the factory stampings? i can't find any numbers on this thing.
thanks