Has anyone considered swapping the front drivetrain from an AWD Express into a RWD model? Would everything bolt up? Basically, I have an 8 passenger G1500 that a) is getting cramped from having more kids, b) is going to need an engine at some point (had a misfire since I bought it 60k mi ago, best I can figure is it's developing a flat spot in the cam, plus it's burning a lot of oil these days), and c) the cheap repaint the previous owner did is peeling off. From what I understand, GM never offered a 12 passenger model in AWD. Is it crazy to think I could swap the front end, transmission, and transfer case over to a newer 12pa model? Might have to deal w/ 6 vs 8 lug hubs, but are there any other major hurdles?