The 88 I have now has a 33" mounted inside as a spare and it hits the tailgate. gotta push on the gate to get it closed. The rear carrier on your truck will hold a 33", but it has to be mounted on a 8" rim to fit the retaining bolt. a 10" rim is to deep. I think when I measured that truck, it would hold a 35" only because of the 1" body lift. But you have to watch the weight on the outside carrier. The way it's mounted really wasn't designed to carry a "big" tire. I was going to put a 33" on any 8" aluminum rim, to help keep the weight down.