Are you talking about a full size Cherokee or a 84+ smaller Cherokee? The axles are weaker on the smaller Cherokee than what you have in the rear of your Monty.

I think a radius arm set-up would be much easier than a 4 link, unless you understand suspension geometry. You can find a program on Extreme4X4.com's website for calculating squat, dive, and roll center on a 4 link set-up.

Lee
'94 LS, 3.0 V6, Auto, completely stock