Depending on your Backspacing 15x8's will work with 31's with no Body or suspension mods. I ran 15x8's with 3.75 backspacing on 31's and they rubbed a little bit on the fender wells at full turn. but now I have 4.5 inches of lift(in front) and run 33x 12.50 Thornbirds
, on a 15x10 wheel of course. I also have some stuff off my truck for sale, hit me up on AIM(Stemmy4504) or on here. Thanks