I'm running the 15x7 with no offsett...(3.5in backspace), if I had been able to source a rim with a positve offset, I probably would have bought it, but, I couldn't at the time, I have a Good amount of lift, and bumpstops, running 31/10.5/15's Mickey Thompson MTZ's, I just get a slight rub on the Right hand side where my pinch weld was, and with the bumpstops have good articulaion, and no contact with the rear flares. BUT, another guy down here in Oz tried exactly the same wheels and tyres and so far, has not made it work, he still needs bumpstops and more lift, also his is the CRD and from what I can see the front ends seem a slight bit different in the CRD to the petrol when it comes to castor adjustment. He is currently see what he can do to get a rim with more backspacing, or getting his rims adjusted down here.
I always say....if you REALLY want to know what IS and what ISN'T going to work on YOUR KJ, best thing to do is
(A)....see if there is someone close by that has what you are running and see if they will let you try the wheels on your car..
(B)... see if your wheel/tyre supplier is nice enough to do a TEST FITTING for you, so as once again, you can actually SEE the combo ON YOU KJ.
These wheels and tyres are expensive things so it pays to get it right the first time.
Here's some pics of mine in action
cmohr