If your looking for a manual for your truck I would look at finding a set of factory GM maunuals, if you have never seen one you will be blown away by the sheer volume of info in these. I have a set for my 80 truck, its a service manual, overhaul manual, and a full wiring diagram laid out front to back of the truck with every available option for that year. It makes it a breeze to chase down those electrical gremlins. plus the other manuals contain every single spec for the truck,It will save you from having to ask a lot of of the questions every new owner will have. from rebuilding diffs with torques and clearances to, aligning the sheetmetal to factory fits, to rebuilding the motor, tranny, steering boxes, even brake boosters, all transmissions, transfer cases, CV driveshafts, and so much more that I can't go on. I've seen them on ebay every once in a while. Theres also companies that deal just in these old books, If I can find it I'll get you the name of the company that got me mine, I believe it was around 90 - 100 dollars for the set. Good luck with your project.
