I did two of these and have some waiting in the wings in case I ever get the motivation. What I found tricky was the void in the area where the ditch lights are located and the relatively short metal frame. I think I made a short frame extension out of plastic to give the pilot-mounting screws a place to go. Sounds like Jeff worked it out to just mount directly in the metal though. I don't see why you couldn't make the mount to the body shell by gluing in plastic strips and drilling and tapping the mounting screws in those.
I've once hoped MTH would upgrade these to fixed pilots, but have pretty much given up. While you are at it, cut off those unprototypical footboards and mount the plow closer to the front pilot. I did that and also plated over the ditch light area and added an anti-climber on my Santa Fe.
Good luck.