difference between a 1940 truck bed and a 1942

Can someone clue me in to what the differences are between a 1940 Truck bed and fenders and a 1942 bed and fenders. They look pretty much the same to me. But I am no expert. I have a 40 chassis and what to build it up as a 40 Pickup.

 

It might help if you told us what the bed is for i.e. chev ford olds plymouth edsel etc?

 

hahaha
To a Traditional Hotrodder, Ford is the the ONLY brand.
The 42 and up beds are 3" wider with of course a 3" wider tailgate.
Side panels and fenders are the same as pre 42

 

Correct you are it is a Ford.

 

So now the next question will it a direct bolt on to a 1940 frame?