I love me some 40's, but without body mods, the truck has to sit so high, that it's awkward to climb in and out of, and the bed becomes nearly useless for a daily driver. I'll be bumping up to 38x13.50's here in the next couple months, along with some 4.56's, as I can still comfortably clear them with my 6" lift, considering my wheel offset. Danny, PM me if you'e in need of a full leaf spring kit for that truck. I have a used 8" kit including complete rear leafs I'll give you a real good deal on. All it's missing is the shocks.