From what i've gatherd the nv4500 are 6 or 8 inches longer (cant remember what the number is) than the getrag. So the length of the driveshafts would be differant, rear would need to be shorter front would need to be longer. As far as U-joints go, im not 100% sure. He's right you would need a second gen clutch, flywheel, adapter plate, and starter.