Great pics. Sounds like a great adventure. I know Hilltop very well, one of my favorite places for breakfast. Makes me miss Fairbanks and AK even more. Wish I was still up there, I would have helped with your adventure.
Based on my past inquiries with C&C they don't do anything to their trucks prior to sale other than top off fluids. I was eyeing one of their M35A3's awhile back and asked what had bed done to it to justify a $12,000+ price tag. The answer... Topped off the fluids. C&C does awesome work on a lot of stuff, it looks like he puts a lot of engineering work into some special project trucks, and parts prices are pretty good, but the answer I got on their stock trucks was disappointing. Then again, we don't know what your arrangement with C&C was, and your M813 is a 40 year old surplus truck. You are a brave man taking that up the Dalton, but what excitement!
Your truck has 4wd if it is all still stock. It has a sprag clutch that engages the front when the rear wheels slip. It not selectable 4wd.