i've checked those out and they are not the same. at least that's what all the parts store guys tell me. and the pics of them do look different as well. the change came in about 1983 or '84 for those engines. i think it was that GM dropped the individual make engines. no more pontiac, oldsmobile, buick, cadillac specific engines. they all shared the same GM engines after that.
1966 CJ5A, mods are coming
1966 Wagoneer, bone stock