that is just a part number there should be an engine size stamped on the block or heads ford made 3 different versions of 351 the windsor was a small block very simlar to the 302/5.0 the big block cleveland and the modified.
that is just a part number there should be an engine size stamped on the block or heads ford made 3 different versions of 351 the windsor was a small block very simlar to the 302/5.0 the big block cleveland and the modified.