I recommend the following:

1960-1966 Chev/GMC Truck Factory Assembly Instruction Manual
1963 Chevrolet Chevrolet Truck Shop Manual

Both manuals have a tremendous amount of technical illustrations and exploded views of every element of these trucks. There are many other references available, specific to these truck, however, these two are a great start.

They are available at:

www.ebay.com
www.classicparts.com
www.lmctrucks.com
www.oldchevytrucks.com
www.truckandcarshop.com

Good luck.

Tony Smith
4-5-6 Chevy Trucks
501 Scott Avenue
Kansas City, KS 66105
913-207-7789
[email protected]
Photos: http://www.flickr.com/photos/4-5-6chevytrucks/sets/
Custom Parts: http://www.flickr.com/photos/4-5-6chevytrucks/sets/72157627022818563/
www.4-5-6chevytrucks.com