I'd wait and see what it does after you get the weight of the tub/roll bar/interior put back on. Right now your rear suspension is only compressed by the weight of the frame which isn't much at all. Once you get closer to full assembly look at the rear driveline again and see if it will work . But something tells me if it's maxed out right now it's going to give you headaches when the suspension is at full extension regardless of how much weight is on there.
'84 CJ-17: 17" stretch, locked Toy axles, 5.5" lift, FI, AX15, D300 w/twin sticks, boatsides & junk.