The guy I was talking to said a comando. He said since it was a SUA setup, that when you used it on the rear of an XJ it would give the lift. Said it was a direct swap, no cutting, welding or fabbing needed. With that being said, I never even thought about the comando and CJ having the same springs. Would the CJ springs fit in the rear of an XJ? If so, I know someone I could probably get a set off of. I've got a set of 6 or 6.5" lift coils here at the house. If these give me 5" of lift, I can put them on with my 1.5" shackles and have a 6.5" lift.
The rear of the MJ's are spring under so have a heap more arch than a XJ rear. They are longer though but might be able to use all but the main leaf?