Continuing the evaluation I started of the floor pans, the rear sill plates are pretty rusty and do have holes in them.
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They had built-in pegs on them that were installed in rubber plugs in the floor. I've seen similar in other makes of cars during my time at a restoration shop but made of hard rubber.
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Rubber receivers in the floor
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The fronts had them as well but also had aluminum trim you could see when opening the front doors. It appears original but in the last 70 years, who knows. I've got some 65 Dart sill trim that if shortened, might work. We'll see after the complete floor has been replaced!
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