Looks like a lot of research here. I discovered that the front axel on my 41 1ton had the same parts as the 46 1/2 ton. Both with 6 lug. I compared them all in the master parts list

While it,the 1/2 ton kit, was not listed as fitting a 41 1 ton I took the gamble and it all fitted and worked perfectly.

In 1946 they changed the 1 ton axel so it will not work on that year.

I was sure my 1 ton would never be used to capacity and any disc brake system is better than the old drum system.