I know my one ton does not have a front sill. I assume the 3/4 tons are the same. The front bed panel has a lipped slot the bed wood slides into. The 1/2tons have a front sill that bolts to the front panel. The 1 tons (possibly 3/4s) have this incorporated right into the panel. The rest of the sills are all the same on my one ton until you get to the rear/tailgate sill/panel.

Last edited by Fox; 01/18/2019 6:36 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