I have an '06 with a 6'' BDS lift. I am running 37x12.5 Nitto Trail Grapplers on 17x9 XD Addicts. The truck shop that did the install recommended 35''s, BDS said 37''s will fit. Naturally I went with the 37''s. At full lock, with the front suspension compressed, I have minor rub. For example pulling into a raised driveway with enough speed to compress the suspension and the wheel hard over. Other then that I have no issues with rub. My friend has 38x15.5 Baja Claws on his F350 with an 8'' lift and when I park next to it, I know I would definitely to go higher on the lift and do some trim work.
6'' BDS Suspension w/ Fox 2.0 rear shocks, Bilstein 5100 adjustable front struts, 17'' XD Addict wheels, 37x12.5R17 Mickey Thompson Deegan 38s, Diablosport inTune, K&N 77 Series intake, Flowmaster 10 Series SIDO, Mag-Hytec diff cover, Rumble Bee hood, one piece aluminum grill, Extang Trifecta.