Other than replacing parts you can leave your vent window unlatched . then you can reach inside and open the door .
The vent window idea had crossed my mind. Without a doubt the driver side parts need replaced, and will be. The idea of the truck being locked from the inside and then unable to be opened except from the inside again is worrisome to me. Murphy's law. When the kids are over at the farm, playing in the barns, and inadvertently lock the doors (hypothetical) then the issue manifests itself again.
My research has shown that the older models only had a single external key lock on the passenger side. You would lock the driver door from the inside, slide out the passenger side, and then lock the door with the key. Passenger side had an inside handle that wouldn't lock. Looks like in '63 they went to both doors having both lock styles. I am simply wondering if there is a way to do away with the inside handle lock and only have the key lock on the exterior.
This is of course assuming that my doors aren't both broken and the key lock should operate the same lock as the handle lock like any modern vehicle.....