With the tb's cranked and shackled you may be able to fit 31's on stock wheels, some trimming may be required. Offset wheels will require a body lift and trimming. Have seen crank, body lift, stock wheels, and 33's with some decent cutting. I ran a crank, body lift, offset wheels and 35's with ALOT of cutting and still rubbed pretty badly offroad. Ulitimately the best way is to SAS the truck and call it done. If you want to keep the IFS there are lifts but that are pricey, and the stock axles don't like large tires or heavy feet.