TDUB, there are no gears other than the ones available stock - 3.31 or 3.58 - that will fit in the 8.0" pumpkin. You can't do the simple LSD carrier swap in a gen 2. He has to buy the entire diff and axles from a gen 1 to swap into his gen 2, along with the 8.8" lsd carrier of his choice. but he does have to reuse stock ring gear and pinion.