Welcome! Glad to have ya. Sounds like a sweet truck! Post some pics. With that big of lift and tires, yer def due for lots of upgrades to yer tranny. Build it stout the first time so you dont have to do this again. You could probably upgrade to the 5R100 tranny I believe that is in the newer superduties. Heard they are a lil stronger than the 4r100's I think. Dont get me wrong, the 4r's can be built very strong. Someone else might know more.