You might want to look at the following links. The 2nd link is a GMC site, but provides a lot of details that are common to Chevies.

http://www.stovebolt.com/techtips/buyers_guide_60_66.htm
http://www.6066gmcguy.org/GMCvsChevy.htm


1960 GMC 1/2-Ton Pickup Truck
In the Gallery
Updates in the DITY Gallery
Now cruising in the Passing Lane