Dude, 4.88s with 35s and a Dual with a 4.7 would be the most stout setup. Stick with a smaller sized tire like a 33 but a wide 33 and run duals first with the stock ratio in the diffs. I ran 32x11.50s,4.88s with dual 2.28s and lockers and its amazing how much more control you have over just a single 2.28. IMO with 39s, 5.29s, lockers and a stock case your going to be breaking things, so do the case first.