[TOMT] Movie [1972-1978] with end credits song "Benny and the Jets"

I saw this movie when I was a kid and half-asleep. I *think* it was in a double-feature with Death Race 2000 but I'm not at all sure of that. But there was this guy who put a claw on his hand, kind of like those ninja claws (can't remember what they're called). Anyway the bits of the movie I do remember keep coming back to me and it's bothering me. I either need to see it, or maybe even just a clip of it, and put this stuck-between-my-teeth memory to rest. Thanks!