Welcome to the garage Ugoogalee!
I have a 67 GMC tilt cab. Rated 32,000 lbs.
It has the 637ci gas V-8.
Also have a shop manual somewhere that covers a lot of it.

Couldn't get your links to work, but here are some a pictures of mine.
A write up is in my sig.
Don
Attachments
DSC05415.JPG (158.61 KB, 114 downloads)
DSC05416.JPG (163.4 KB, 112 downloads)
DSC05417.JPG (176.62 KB, 113 downloads)
goodell_steve_1972d.jpg (63.09 KB, 114 downloads)

1967 GMC 9500 Fire Ladder Truck
"The Flag Pole"
In the Stovebolt Gallery
1946 2-Ton grain truck
1946 3/4-ton pickup,
1953 1-ton pickup
1957 1-ton flatbed dually,
1954 Pontiac Straight Eight
Of all the things I've lost in my life, I miss my mind the most!