And this is what the seat mounting pads look like.
As I understand Chrysler used these for the bench seat mounting in their production cars. I have never seem them before.
Picture is taken from Classic Industries. View attachment 1715232665
I have several of those spacers that I found under seats of other A-Body's, they are kind of a fiberglass/plastic mix. My Hemi Dart is just going to be a mix of old race parts and hacked-up junk that people used to make these cars light and fast without thought to the way it looked...