You can remove the bracket in inside the main one and put it ant way you want, tighten down the u bolt. Not sure it would hold, but I would just weld mine and know its not gonna move.
3.5 i think and the dana 80s are 4 inchDoes anyone know the dia. of the axle tube ? I could measure it I guess, but I thought maybe some would know off hand. I,m going to start on the traction bars here soon.