On a further note, I did a bit of searching for existing disc brake kits being offered on-line for '41-46 1/2 tons.
Found at least 3 vendors offering them, but for the most part all either indicate they "will not" or "may not" fit stock wheels.
The original wheel design just doesn't have enough space in the design to fit over the non-standard disc brake set ups without using wheel spacers (most folks recommend to stay away from this idea for safety sake).
Your choice on what you decide to pursue.
Dan
