What you really want is the Chevrolet Truck Shop Manual. That's the manual GM published for factory defined repairs. These are also now available ion CD:
http://www.americanclassic.com/Googl...IT-93-1964.htm
http://www.gregsonline.com/eshop/Shop_Manuals/64TSM.htm
With the 64 supplement you will also need the early full manual.
In addition, I’ve always relied on the good old “Motor’s Manual”. I’ve been using the 1960 version since about 1962. Here’s a link to one on eBay just to show what it looks like.
http://cgi.ebay.com/ebaymotors/1960-...sQ5fLiterature
There are also listings for truck repair and truck chassis repair manuals:
http://cgi.ebay.com/1960-1970-MOTORS...item53e45adf7f
http://cgi.ebay.com/ebaymotors/1960-...sQ5fLiterature
These are just representative examples of what’s available. For many years these were the “Bible” of automotive repair. Chilton’s came along later (at least I never saw one until the late 60’s), and some editions are very helpful. In my experience Hayne’s manuals by comparison are not worth the cost of printing them.