You might want to do a Google search on "Black Diamond coil conversion". Black Diamond, which is now owned by Superlift, makes the conversion kits. They're pricey, but reportedly do a good job. The front is converted to a coil suspension similar to TJ, and the rear is converted to a SOA leaf spring configuration. The Google search I did had the manufacturers layout, some distributors' words, and some test reports by various individuals.

1977 CJ-7, fiberglass body, AMC 360 w/ headers, DUI ignition, Edelbrock intake and Holley 4150 carb, TF999, Dana 300, 4.56 gears lockers, York air comp, 4" susp lift, 2" body lift, BFG 35" M-T tires, Megashifter, AGR pump & box, REP8000 winch.