Help identify truck

[TheDude]

Here's my truck, I am just starting with it, sorry for the newbie questions. I am told the truck is a 1947 3/4 ton, from what you guys know, is that right? The wheels are 8 lug. It seems parts for the 3/4 ton are hard to find, and I can't find a disc brake conversion kit.

Is a 3/4 ton with 5 windows pretty rare? Anyone have any idea how many were made?

Also, there are red lights on the top of the fenders, are these still available? What were they there for, indicators maybe?

Thanks!