Great googly moo you stumbled into a really really really neat truck.
A 116 ECB is likely to mean Alpha Company, 116 Engineer Combat Battalion of the Idaho National Guard. I found an article here -
116th Engineer Combat Battalion remembering the Korean War with 70th-anniversary reunion - East Idaho News.
You don't appear to have to do much, it looks in fantastic shape. But in my case, being an IT person, automotive stuff is all pretty much new to me. I am just taking projects slow and reading alot. People here are helpful, and there almost always is a thread with relevant information when searching.
These things are 70+ years old so inevitably it will need some stuff worked on. I had my engine and transmission rebuilt and am currently replacing the wiring. Rubber parts are particularly prone to aging and likely many will need replaced.
If you make your truck available for local events, people usually have great interest in these things. I take my M37 and M35 shop truck camping for amateur radio stuff and I always have visitors. I have also been asked to do parades and such which I will do when I get the repairs complete. They are also just a blast to drive, I love taking mine out just to explore my region. M37 is better than my M35 shop truck for this since its smaller, looking forward to finishing my wiring and getting it back on the road.
Portrayal Press sells the manuals -
#1 Restorer's Manual Bundle - M37 (portrayalpress.com) I bought all these separately and I suppose I could have saved a bit by just getting the set.
This type of bag is what we used when I was in the service, I got a couple and they are good for holding the books -
Canvas Pamphlet Bag Assembly 7961712 BAE Systems OD Green US Mil (mibotparts.com)
I recommend Vintage Power Wagons for parts -
Vintage Power Wagons - 1939-71 2WD & 4X4 Dodge Truck Parts & Info the staff there tolerates all my dumb questions and have really been helpful in getting me sets of parts so I am not discovering I am missing a piece I need in the middle of a project.
My truck in the field -
