Is there any place to find a real service manual, I have one for my 48 jeep, its really nice, details almost everything, even step by step to removing and rebuilding engine. I am not sure where to find something like this, and I mean for a GMC, the chevy is the same, but its not the same

, I want to find one that has the rebuilding guide for the v-6 if anyone knows a company with some nice manuals I'd really appreciate it