My most recent manual purchase was a CD from "Detroit Iron USA". I am not that happy with it for what it cost, seems like it was around $50.
I bought it because I needed specs. for a rebuild on a 292 that I am doing and figured I would buy one for 1968 model trucks as I have one of those too.
I had bought a 1968 truck shop manual, but it turned out that I didn't pay enough attention and what I got was the Chassis Rebuild Manual, which didn't have the engine assembly specs. for torquing main caps, flywheel bolts, head bolts, etc.
Get a genuine Chevrolet shop manual for your truck from any of the vendors or from ebay. They are invaluable for figuring things out.
