Seat tracks or parts
From left to right, a early bucket seat track, a early bench seat track ( both the same track design ), then the later model track design that could have plastic cages. I have yet to lay hands on the cages and rollers ( found the later plastic type but not the metal ones ).
![seat tracks.JPG seat tracks.JPG](https://www.forabodiesonly.com/mopar/attachments/seat-tracks-jpg.1715285898/)