So wondering what is a good wheel fitment for 1960 to 66 c10s. I'm currently running aftermarket rims 15x7 with a 3.75 backspacing. These wheels aren't what i'm liking so shopping for some other style. (steelie) There are so many rim backspacing in the 15x6 to 8s . I'm running 235 75s for tires.