I just watched Death Race 2000 on TCM. What an amazing film. The movie stars David Carradine and Sylvester Stallone. I don't even know how to describe this movie. But I did hear that this was some of the inspiration for Quentin Tarantino's Grindhouse flick Death Proof.
Here is how IMDB summarized this movie:
A champion of a brutal cross-country car race of the future where pedestrians are run down for points has a change of heart while being hounded by rivals and a conspiracy seeking to stop the race.
I'm thinking that there had to be some overt political message that was trying to be conveied in 1975, but here in 2008 I could imagine what it would be. There is some edit worry scenes but I can't help but recommend you watch this movie.