There are a couple of "side-effects" of spacer lift on KJ.
You are actually causing the contraol arms to be "pryed" apart and this causes the arm to be closer to spring and can cause rubbing, or rubbing on top bumbstop.
Also with mine, the combo lift, an OTT spacer is put above the stut, which pushes the strut assembly down so now the bump stop is not long enough.
but this should not be a problem with the daystar lift.
Try putting on 32" tyres, then you know what rubbing is. I have had to do a LOT of trimming so far.
Also if you get the chance, remove the rear swaybar for a daytrip. Its amazing the difference it makes. I have mine permanently removed now.