You might, and thats a big might, could fit them stock, but I'm pretty sure there would be rubbing, the best thing for you to do would be to get a leveling kit, or even better a 4" lift. I'f I were you I'd go with a leveling kit from Donahoe Racing, they make the best lifts for Super Duties. As for stock with no rubbing, I have 305's on mine stock with no rubbing at all, thats as big as I would go stock, but 305's just aren't enough for me. /ubbthreads/images/graemlins/grin.gif