Orren,

Not sure what year truck you have, but on 47-53 AD there is a bracket that attaches to the top of the apron at the front, and it then snakes down underneath and bolts to the running board. There is a hole in the running board for this mounting bracket. At the rear it does indeed bolt to the rear fender.

https://photos.app.goo.gl/6NpssPA54ij9C9Us8


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