The only real obstacle on Slaughterhouse is the whoops in the woods after the big hill. It is easily bypassed on the right hand side. Your buddy in the modified rig will want to stay to the left.
We rescued a stock LX470 that broke a R&P in the front diff from the trail last month. He was able to make it out in 2wd. You'll have no trouble. Kingston Peak is very doable in a stock vehicle too. It should be open soon and is far more scenic than Slaughterhouse.