Thanks. I honestly don't know about the axles, other than they are Yukon. Rear end was in the car when I bought it. The wheels require spacers front and rear. I think the fronts are 1" and 3/4" in the rear iirc. Bought billet spacers from Amazon, and some new lug nuts, and they run great on the car. Running 235/40/18 and 275/40/18, lowered on BBK springs with a little coil trimming to get the desired stance. Here's another angle.