I was seriously considering the same thing. It's not overkill, it put's you a little lower than a stock front case and 4.7:1 gears in the rear. The advantages are your d-shafts are almost the same length so you only need one spare, you have more gear choices and you have 4 shifters!!. But you need a 23 spline rear case. The concensus is a 21 spline case will not hold. So after I added up the cost of 2 adapters, another case and the 23 spline conversion it was cheaper to just do the "ultimate".
