Im doing a 3 inch bdy lift this weekend. I already have aal tt and shackles. I want to do a 33x12.5x15 but would i need a 15x8 or a 15x10 wheel? After wheels and tires i plan on getting perrys fenders up front. so which wheel would be the best choice?

I personally think 15x8.

but recomended is 15X10. You'll still fit 33X12.5 on 15X8 though.
Just like he said, 15x8 should do it.