A YJ axle is high pinion but, it is also a CAD axle. There is no UCA mount cast into the CAD portion, the trackbar mount is cast there instead, something could probably be fabricated off of it for a UCA though, maybe. There is no UCA mount cast into the top of the diff. either, which will also present a problem. The shock mounts are welded on where your LCA mounts will need to go so they have to be moved. The steering stabilizer bolts onto a portion of the pass. side SUA mount but it can be flipped to the top and your spring buckets can be notched to clear it. Stock YJ steering will leave you with a dead spot in your steering.
Besides that, its a totally bolt in affair:laugh3:
Wouldn't be my first choice for an XJ axle