The front panel has a very long rod that runs the entire length of the top tube roll. In order to stop it from spinning, have a pal hold a wrench on one side while you remove the other side’s nut.

I’ve never heard of the factory welding the actual tailgate in. However, the stake pockets, the vertical pieces on the box sides, have been known to be be welded to the rear cross sill to keep the box square and rigid.

If I’m off base, post a picture and it will likely make more sense to us.
Good luck.

Last edited by Fox; 03/13/2019 2:07 AM.

1970 Chevrolet C10
Grandpa's -- My first truck -- In progress to shiny
Follow the build in the Project Journal
1950 Chevrolet 1-Ton Dually
"Ole Red Girl"
In the Stovebolt Gallery
More pictures here
1951 GMC 9430 1 ton dually--Shiny! | 1972 Chevrolet C20- Rusty- the puzzle box lid for the C10 | 1962 AMC Rambler American- my wife's
Parts trucks-
1951 GMC 9300 | 1951-GMC 9430 | 1951- Chevrolet 1300