When I bought my '46 pickup now some 25 years ago it was rode hard and put away wet like most old trucks. One of my local buddies from the Chevy club said he had owned this truck and AFTER THE WRECK, they couldnt find a 46 so all the fenders on one side came from a 41. I knew the parking light on that side was wrong but turns out lots of stuff was goofy like, the fender braces and inner fender panels were different on that side and the rear fender was narrower. Not sure what year that rear fender came from may have been a 40. Also the cab itself on the 41 is different because of the rear window rim, at least the inner shell is.
I had scrounged parts from many war years trucks and one thing I found were stamped steel outside door handles on some of those trucks. Another friend had a restorded US Army pickup, had a glove box made of steel that was HUGE.
Thanks for starting this thread.