The numbers on the back of the block are just casting numbers. they only tell you what block it is.many engines could have the same block. a 327 and 350 can use the same block. the best way to tell what you have is to look on the pass side front, the deck that the head bolts to has numbers stamped into it. those number will tell you what the engine is,what car it came from,the production plant,and what tranny was originally behind it.if you need help email me the numbers and I can look them up for you.
