Ok, talked to my friend today and the wheels are 15x12.5 with a whopping 6" of back spacing. Of course I'm going to test fit them first and I'm sure we're going to have to cut the fenders out a bit, but that's no problem for me.

As for the 14" wide tires beating up my axles, I'm not too concerned about it. I'm going to have these tires for strictly weekend offroading and nothing too serious. I still have my set of 275/35's for street use, but then again I hardly ever drive the trooper any more. It's been sitting for a while and only gets driven like once every two months or so.