I Know i'm going to catch hell for this but i ran a D30 high pinion on my zr2 in this thread i built. http://www.greatlakes4x4.com/showthr...CK48461&page=3
i did do the yoke swap the Wadey recomended worked out beautiful. I drove mine for show boating around town though and mild wheeling. The guy that currently has the truck since I sold it put a mildly built 5.3l in it new custom front driveshaft and harden front shafts and he goes to the dunes alot. (not mud) Mild trail riding and hasnt broke anything. But between buying the axle used all new brakes. Using my stock hub bearings on that axle and having spacers made outta 1/4" plate to keep my offset right for the brakes and redrilling the lug pattern in the xj rotors i had less than $600 in it. Thats counting a used set of 3.73 gears to match my rear. I did leave it open up front though.