The rear disc on a ZJ will work on a Dana 44 35 and Chrystler 8.25. The 8.25 needs a little modification (bore out a hole) but pretty much a direct bolt in. Did it on mine before I went to tons. Try to get the ZJ e-brake cables. The brakes will drag a tiny bit if you don't swap the proportion valve. I never did and didn't really notice the drag.