I'm debating on whether or not to do a drivetrain lift on my truck. The plan is to raise the tcases ~4 inches, while leaving the engine mounts stock height, and then build a new crossmember. I would have to cut out the transmission hump on my floorboard, as well as notch or remove one crossmember (which many have done with no related problems). I don't know if I would need to lengthen my front driveshaft, but I'm pretty sure i would need a rear cv (which I technically really need anyway). This would give my truck a flat bottom, which combined with the inboarded springs, would leave very little to catch on, and greatly improve breakover angle. I could also add a second tcase mount to my dual case setup, greatly improving its resistance to motor mount killing engine roll.