will interco 38.5 14.5s 20s fit under my 2500 with a 6" suspension lift(not sure what brand yet) and a 3" body(also dont have yet)? also what kind of offset should i get in my rims? PS I HAVE fit these tires on a nbs 1500 with a 9" total lift but they rubbed bad if you turned hardish. so im hoping they will be good on my truck with a bit of trimming? Thanks.