I was watching the remade (reimagined?) RoboCop last night on Film4 and saw this...
There is also another scene where a (the same?) 454 is clearly parked up with a 451 going in the other direction. Two things spring to mind...
1. Really cool that a 454 is in a film! (albeit for a very brief time)
2. The move is set in Detroit (and Wikipedia does say this) but the majority of the filming photography was in Canada. While I don't believe the 454 was ever officially sold in the USA, was the 454 sold in Canada?