Shackle problem

My 2001 leaf shackle bushes need replacing. I have a 2.5in procomp lift fitted, im thinking about fitting daystar greaseable super shackles giving me an extra inch of lift at the rear. Would this cause any additional problems or will the jeep be up too high at the back. The jeep is stock apart from the lift.

I don't believe so, alot of lifted XJ's ride ass high anyways

There is potential for a lot of issues. You could run into driveline vibrations. You may have to consider a Slip Yoke Eliminator, or at least a t-case drop. You will probabaly also need a longer rear brake line, and longer shocks.