Originally Posted by SocalWJ
Measure from the center of your hub to the bottom lip of your fender. This should give you an idea on how much lift you have.
Maybe one of the ZJ guys can chime in on what the measurement would be stock so that you can compare.
That's assuming he hasn't cut the fenders at all.
And OP, quick search just turned up that stock ZJ suspension H to F measurement is about 18", so you just need to go out and measure from the center of your hub straight up to the edge of the fender, then subtract 18" from whatever you get.
Do this at all 4 corners.