Well I plan on running a 8" wide wheel with a 4" back spacing and pushing the front axle forward 1" so hopefully that will allow clearance when stuffed of the 315/75 R16's. I will also be properly setting up the bump stops once the lift is on and I check clearances. If not, I'm not afraid of a sawz all.
This truck isn't going to look nice ever. It's going to be purpose built and if a little bit of sheet metal gets in the way, that's not going to stop it. lol.