we could swap doors. I have the opposite problem that you have
Well, that almost sounds like a plan, Carl!
Flattop- in reviewing my journals, I don't think all those measurements and drawings will help you in any way. They would only go to serve that it would be very difficult to make a '52 or later handle fit on a '51 door.
I noted in the journal, "Stovebolt Aficionado Tim (tclederman) says it's easier to fit the '51 door hardware on '53 cab than it is to modify the '51 door to receive the'53 hardware".
Let us know what path you decide to take, flattop, and we'll be there for you.
Best of luck!