Sure it would be easier, but if everyone took the easy way out we wouldn't be where we are right now, would we. I know the XJ unibody is not designed for that much axle or tire, but you have to realize this is a guy running 36s on 4" of lift. The unibody wasn't designed for that either. Cheap seems like the type of guy who will push the envelope far beyond common belief, and do it right.
I'd like to see this project done just so I can learn something from it, as many others im sure. Plus, how badass would that be.