Does anyone know where I can find technical information on how to perform a spring-over lift on my
(full size) Cherokee?

I havn't done one on a fsj yet but I can tell you it is a lot of work, things that must be adressed are steering, brake lines, new spring perches, pinion angle must not change from stock and you have to weld the new perch onto cast iron. driveshaft length usually needs to be altered, shocks will need to be moved or replaced. and I believe your rear is already spring over? if I am right you will have to lift it some other way, I would not reccomend lift blocks as you are going to get 5 1/2 to 6 inches of lift and thats wayy to much block.

i helped a friend do his and we used chevy axles..they already have the top mounted perch in the front and the bolt pattern is the same...we still had to grind the weld around the knuckles and adjust the caster angle(not for the weak of heart). it is a TON of work......then there is the sreering....i madde a custom mount that bolted to the top of the chevy axle and made a drop mount for the stock power steering box.........