Justin,

I don't have a picture, but have had several trucks of that era. The floor board fasteners are 1/4x1 flat head, and the toe board are 1/4x5/8 round head. All are slotted.

Paul


1941 Chevy 1 1/2-ton WW2 4x4 dump truck
In the Stovebolt Gallery
Lots more pictures