Brad,
I plugged up everything I could on the front panel. I cut little templates and then cut steel to cap it. The brace in the middle is closed off along with the top roll. Hopefully water doesn't get in there too. For the bedside roll I plug the ends with an 1&5/8" expansion/freeze plug. It fit like a glove and looks quite custom.
The top roll is just 16 ga exhaust tubing. I also used a freeze plug and welded a nut inside it and then placed in the panel top roll.

http://s1372.photobucket.com/user/f...mage_zpsy7an6zhp.jpg.html?sort=3&o=0


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