I have 5-6" of lift and trimmed but only enough so that I moved up the factory flares and they still fit the body line and I still rubbed a bit as well. I never bumpstopped though which the guys at
http://www.naxja.org/forum/ claim will allow you to run those bigger tires with minimum trimming. If you take the time to research it is one of the best sites for XJ's on the web.
I also might have a set of hydraulic Skyjacker shocks for 4" lift height that if they are still good I will sell for a good price.
Here are some pictures of the front, of course it depends on how nice you want it to look. You can see that I only really bent the inside lip in and trimmed and moved the factory flares up. I imagine if you took the time and your truck wasn't too rusty you could make it look pretty nice. I seem to take function over appearance.
Dwayne
:beer: