The car used in the movie was a 1972 Dodge Charger with a 440 magnum engine. It is however, described by Eric Roberts in the movie as a "...1969 with a 440 magnum..." - it is not that model.
It also had the standard flat hood without the bump that fitted over the 440 magnum.
There was only one picture vehicle used in the film, it was originally green and was bought from a company that had made adult films, it had been used in many of those productions.
It was later owned by Jesse V. Johnson, director of The Butcher.
www.jessevjohnson.webs.com - it was used in several of his movies:"Charlie Valentine", "Green Street Hooligans 2" and "The Butcher."
It was sold to an auto museum in Germany in 2009.