40 ish" Panel Delivery seats info

[rockfla]

I got this set of front seats in with another set of seats and I "believe" they are from a 40ish panel delivery...they are missing the front support brackets and maybe the rear support braces give a clue?? I am confused on them. As you can see, they are upholstered with modern upholstery BUT I can remove that IF anyone is interested or has a need for a set for a panel delivery IF that is in fact what I have??
1) the folding smaller backed seat, which I thought was the "accessory" passenger seat had the adjuster mounted on it???


2) the lager, metal backed seat (there is a metal back with strengthening ribs in it under the upholstery on the back), non folding, which I thought to be the drivers seat, but NO adjuster on it??


Not sure if that whole set up is backwards?? SO If anyone has original pictures of the seats from a 40-48 panel and or the front mounting brackets? thanks in advance