Sounds to me like "Two Lane Blacktop". Story is about two guys drifting around the country making money on grudge races with a black primered "55" Chevy street machine. Warren Oats plays a supporting role in the film. Story is kinda of weak, but good racing scenes from back in the day. James Taylor (who can't act) stars in it along with some woman who's name escapes me now. Don't think they get killed in the end. Think they just drive off into the sunset. Worth a look once. I think Netflix carries it. Hope this helps.

Ted