If I'm right it'll be about 6" of lift. And Yeah, you'll have to do some other mods too. Brake lines, SYE and CV.
I never did one to any of my Leaf Sprung Jeeps, but I've heard it give awful ride qua....
You know what, forget I said that, do it and be sweet with a rough ride and 30" clearance.
Jeep: Pioneered by a war, popularized by AMC, revived by Chrysler, jacked by some Germans, and copied by all.