And you've heard of the "big block" 318 right? Then of course there's the RB 383.
Confusion can happen.
Lol.
One day I drove my Barracuda to the local Speedway gas station and had a guy (guessing around the same age) start telling me who I got my car from and rattling off about it. I explained how he was wrong and told him of the previous owner as well as two others prior. He was insistent I was wrong and he remembers everything about my car. In lieu of the awkward argument at the gas station I just let it and him go.
BTW, It was in fact another Barracuda, a '68 that he was thinking of, but he refused to believe he was wrong.