check the WARN equipment site for their rear axel to disc brakes adapter. Once you purchase the adapter , they list the parts you can get from yards etc. to complete the build up . jeep list cj owners do this one alot. their rear diffs. are the same units . WARN makes locking hubs , overdrive parts, transfer case items etc. should run all told under $200.00 . February 2002 PETERSONS 4 wheel & off road has a great article on the AMC 20 - good picture of an easy brace fab for the axel tubes. waiting on the dragless info...... brien 1981 GREMLIN 4X4 TURBO Quick Lite & smokin'