o.k., here is my first try at attaching photo links.
I know a lot about cars & trucks, but the oldest I have ever worked on was early to mid 1960's.
I will show my ignorance here and ask this: What is the pedal on the floor to the right of the gas pedal? My father had a 1950 F**d 1/2 ton, but I don't remember that on the floor.
Look in the glove box in the interior photo and you can see the rats had a field day in there. I probably just destroyed the birthplace of hundreds of field rats.

http://i128.photobucket.com/albums/p199/johnmarkp/1-6-07001.jpg

http://i128.photobucket.com/albums/p199/johnmarkp/1-6-07007.jpg

http://i128.photobucket.com/albums/p199/johnmarkp/1-6-07008.jpg

http://i128.photobucket.com/albums/p199/johnmarkp/1-6-07010.jpg

1957 Chevrolet 1/2-ton Stepside LB in the Gallery
My Photobucket shots

The person who has nothing for which he is willing to fight, nothing which is more important than his own personal safety, is a miserable creature and has no chance of being free unless made and kept so by the exertions of better men than himself." - John Stuart Mill (1806 - 1873)