I just found some more information that might be helpful for you. I do know that the serial numbers in 1958 were on a plate on the left door hing pillar. These websites might be able to tell you a little bit more about what you found. [url]http://www.t137.com/registry/help/bodytags/bodytags.htm[/url] [url]http://www.townwagon.com/sites/tw/years/vinnumberpage.htm[/url]

The letter 'L' indicated the model year which was 1958. Starting #s: D100 (6 cyl) = L6d10-L01001 D100 ( V8 ) = L8D10-L01001

Sources: Standard Catalog of Light Duty Dodge Trucks