My best friend had this exact car growing up and rebuilt the 350 with performance parts and put a posi rear in it etc. It was scary.My friend and I verified that his 1973 Pontiac Lemans 350 2bbl would indeed peg the 120mph speedometer on Route 22 heading west near Route 100 in Fogelsville.
Then he had a race shop rebuild a 455 Pontiac big block and he put that in and drag raced it. It was insane!