Not trying to burst youre bubble here,but a close freind of mine has the identical truck, with a 6.0 gas engine in it, and his weighs at 9,000 # empty weight, with a light weight sleeper in it, leaving him with a 1,000# load capacity weigh limit.So are you absolutely sure you can haul 3,000 # with it legally? Michigan pulled his driver over in this truck and put it on the portable scales on Telegraph rd and shut him down, plus a ton of citations. He now has it for sale, and nobody wants it, because of the low gvw for such a heavy empty weight vehicle.Just trying to save you some un-expected heartache in the future.If it is space you want for you and youre wife, maybe a single rear wheel drive spartan body would better suit youre needs.