Sal,

As Tim stated there are options from GM not to mention several different after market brands that are common to these trucks. Here is the picture of the two most common. These appear in the Salesman Data Books and the yearly pricing and accessory guides. As for your 1953 truck either of these would be correct.
http://www.flickr.com/photos/advance-design_parts_co/8258511484/in/set-72157632208362076