Did you find out anything? I looked at a couple of the older fords,I really like them I sold my uncle my ford 2000 for him to use around his place but it doesnt get sold to anyone. I would have as many as my wife would allow around here,maybe when I get my shop built to work on them will pick up another to tinker with....
Do a search in google "801 powermaster" and there is one in a photo with the side air cleaner and stuff like yours but didnt wonna copy the photo and post may have a copy right...