Help! Manual Required

[Dune Wolf]

I have recently been willed a '79 GMC C/K 2500 from my great uncle who passed away. With him being the original owner of the truck, I can't pass up this opportunity to restore this beauty since it is still running well and it only has 86,000 miles on it. Obviously, there is a lot to do with it, but I am having a hard time locating a genuine factory manual original or reprint for this specific make and model. I know this truck is somewhat on the rarer side (at least here in Canada), but shouldn't it be easy to find a manual online? Any help would be much appreciated in locating this book. Thanks!