I built a ZJ a few years back and started with about 3" then went to 4". Cut about 2" out of the front fenders and cut and folded the rear. It cleared 33s pretty good. Not sure what front drive shaft you have but if it has a CV at the axle yoke you'll need to swap it for one with a u-joint because the CV type don't like 2" much less more and will come apart at the worst possible time. Not that there is a good time.
I got that Jeep thing now it hurts when I pee.