About 25 years ago I knew someone who bought a clone of the 58 Impala used in American Graffiti for $25k. The mechanic who did a disc brake conversion on my 64 also built the el Nomado
He started with 2 58's, a 2-door Biscayne with a good frame and a Nomad wagon with the original and rebuildable 348. He bored the engine .030 over, upgraded the drivetrain and built what would've been the 58 elCamino. Even one of the top execs at GM said they should've built this car back in 1958.