Just a FYI,
If you have a choice, I would choose a 1942-46 box.
Not that there is anything wrong with a 41 box, it is just a one year only.
It fits and looks the same, it just uses 1/4" reciprocating balls, instead of 5/16" that started in 1942 and was used from then on.
This is to say that parts for the 41 box would be harder to get, if the need arises.
