I know that over the years other parts get swapped.. a '47 might sport a '52 front end, or maybe some resto guy has a title on a junk truck, and a nice truck with no title, and could do the ole "switcharoo".
From all i've read about these "custom" trucks in subsequent research, if this truck were a "switcharoo" truck, the previous owner went thru alot of hassle to make it look like a "custom" just to use it as a beat around farm truck (the floor is full of dried mud from his boots) then when it started using a bit of oil, he parked it and used it for a storage bin for $1 lots he picked up at the auction.
The previous owner bought it from a fireman, who was the original owner, who put the spots on the truck (one of which is red, for whatever reason).
I asked about the age of the truck mostly because I wanted to see what the heck the thing was worth before I bought it without really nosing around too much into it, or seeming too intrested in it to the seller, not because I suspected foul play or the ole "switcharoo".
But I don't blame folks for being aprehensive about less than common factory configurations, and it's good to get opinions from both sides of the isle.