I guess I have never seen one with power steering or a different box. I have the 41-46 steering box in mine, it steers much easer then stock, but still requires work at very slow speeds. I can see where power would be nice, but I wouldn't want a fast ratio box since the truck is pretty top heavy, I could see getting in trouble with that combination.
Good luck with your quest, and post some pictures when you get it figured out. Joe