also it uses brackets to mate your existing springs to the dana 44, instead of using bronco coils. The trackbar mount in the kit mounts to the engine crossmember, which might serve to limit axle travel, since the trackbar would be shorter. Also you would not be able to trim the engine crossmember in the event that you may need extra clearance for the pinion. Also, it does not incluse new wheels or tires, which most of us have included in the overall price of the swap, as well as changing the rear axle shafts and gear ratios. And like Kris said, it uses a low pinion EB axle, which is not desirable because of front driveline angles and clearance. Things that I also included in the swap that are definately not part of the kit are longer travel shock mounts, oxlocker front and powertrax noslip rear, wheels and tires, all new brakes and hubs for the front, new rear axle shafts, wildhorses EB 5.5" lift coils, and 7 degree c bushings, and I still didn't come out too far behind the cost of the 4000 fabritech kit price.