AH-HA! Looks like there is a nice metal strip that holds the door edge in place. I don't have those; may be able to fab some at a friend's place with his shear and brake. A picture sure helps.
I just added a photo of the floor mat I installed today, and you can see the kick panels just temporarily in place. Thanks!


1940 Chevy 1/2 ton pickup "KC"
A day without sunshine is like, well, ..... dark!