Mopar Forums - 76 W100 Steering Shaft issue

First off, I just signed up today and excited to be here. I bought a 1976 Power Wagon W100 back in April and finally got it on the road here last week. It required a bit of work to have it on the road but nothing I couldn't figure out.

Now I'm a bit stuck with this issue.

The steering wheel is sloppy - I thought it was the rag joint but check this video I posted on it and you'll see the issues pretty clearly.

Problem is, I dont know anything about the steering and the books I am using http://cdn.ceo.ca.s3-us-west-2.amazo...0f8g-books.jpg didnt really help me out as the images are hard to see and Im not even sure what the name of these things are.

Can someone explain what I am looking at. Looks like a set screw is missing. When I bought the truck, the horn and cover was missing so I assume they tried to fix this issue and made it worse.

Had the safety inspection done and everything is good such as ball joints, control arms, tie-rods etc. I know a bit about old vehicles but bought this to learn so Im sure the truck doesnt even have some of the things I just said.
Im flying solo here though so I thought Id reach out to the community for some support.

I have a buddy on the other side of the country who helps a bit but doesnt know much about the steering either.
This pick compares his truck's steering shaft and mine http://cdn.ceo.ca/1ds0fee-truck.png
My Truck Steering shaft http://cdn.ceo.ca/1ds0fen-truck2.png

I tried searching this but had a really hard time finding the information.

Best regards;

-Even