If I am not mistaken, the Dodge trucks like that with the small windows at the top on the sides were radio trucks and they are pretty rare.
This one was on eBay in Canada recently.
http://www.ebay.ca/itm/1955-Doge-Pow...item51d6de4895
From the description:
"The M152 Panel Truck is a member of the M-37 Dodge 3/4 ton 4x4 Truck Family (G-741).
The panel truck version of the M37 was called the XM152 by the U.S. military, using the X prefix since it was not made standard. The M152CDN panel truck was a variant of the XM152 panel truck, made for the Canadian Army in 1954-55. It was standardized, but only about 1000 were produced.
The M152 was based on the M43 Ambulance, but with changes such as sliding side doors, single or double rear doors, side windows, etc. There were small differences between the XM152 pilot models (five built in various configurations) and the M152CDN, the only production vehicle with side windows.