i just bought a 1940 gmc from ebay. I am picking it up tomorrow! the bed is very rough and the cab is missing the floor.

my questions...

how is a 40 cab different from 39, or 41-46?

how is a 1940 bed different from 1941-46?

running boards?

i have seen fiberglass repro fenders, are steel repro fenders available?

thanks in advance
john