http://home.znet.com/c1937/Prod.htmThis site has a lotta good stuff, but no breakdown by factory, and nothing for the 50's. The two years that he does have there say that the 3600 was the largest production run, which would probably be right, as these would have been the first ones out after wartime production limitations. Whether the short bed vs long bed ratios held true into the 50s surely somebody must know.
