I bought a 79 chevy PU to plow with. It needs tires, I have some 235x85x16's that are new, but don't want to spend 250 for 4 new 6 lug 16" rims. I found a set of steel rims from a 92 4x4. 6 lug 16x7's but they have the deep backspaing. Anybody ever use newer rims on older trucks? any problems doing so?