I washed the new housing out and painted it except where the perches live I assembled the whole thing to make sure that it all still went together then sorted out the brake lines and handbrake then removed the hubs axles and backingplates then installed the housing under the truck with marlin u bolt flip kit and got the pinion flange to point to the t case the tacked on the perches , removed the housing and welded up painted and bolted back under the truck and reassembled the housing