I am assuming that you want them for your 3500, it dose'nt say if it is a dually or not. I had a friend that put a set on his 04 3500. First he had to lift it, adapters,then wheels and tires. He was running a 3. 54 ratio from stock. Could not pull a trailer until after he changed to a lower ratio. It would run about 1900 rpm at 60 in 4th gear,so he got great mileage as long as he was on real flat ground. Finally changed to either a 4. 56 or 4. 88 ratio and got a little power back. By the time he got done with everything he was into it over 10k. The truck did look cool, but it did'nt do everthing that he wanted to. Finally sold it for what he had in the lift and tires and bought a 2000 dually 4x4. I ask him if he would do it again. A single NO and thats all he would say.