I would ask the vendor, J&M Offroad, for the specific contents of the kit. based on the picture, it appears to have the basic parts you will need:
Taller coil springs, dropped Pitman arm, drop brackets for the axle pivot and radius arms, rear blocks, AAL (add-a-leafs), and four shocks.
If your Bronco has four shocks in the front, you may want to order two more shocks with the kit. Optional items like extended radius arms, lifted rear spring packs and longer brake lines are not absolutely necessary, but will improve on the 6" suspension lift kit. They also will drive up the cost to around $1600 for those items. you will need an alignment after installing the kit, and may need to get new adjustable camber bushings for the front. I've installed quite a few Rough Country kits on Broncos in the past year, and have only come across one common problem. The bolt holes in the axle pivot drop brackets do not line up with the factory bracket holes in the Bronco crossmember on some kits. May want to ask the vendor about any issues with that and what to do if you have a problem installing the kit. I'm not familiar with that vendor, JSM84
