This is a rear disc brake set-up i put on my 1980 Ply Volar'e station wagon. It's a 8.75 rear from a 1970 B-Body. The calipers, pads and rotor are from a 03-07 Liberty. The caliper bracket is from a 1995 Grand Cherokee. The bracket must be modified to work on all 8.75 rears. The brackets are all the same on the Liberty, Grand Cherokee and the Wrangler. Liberty rotors, calipers and pads are much beefier. Any rear disc brake set-up is way better than drums from the 60's an 70's... 50 plus yrs ago.