Yes, the adjustable seat tracks for the passenger side. Mirror of the drivers side.
They both have a fork in the front that goes under a bolt and the rear has a hole on one track to bolt down and a hole in the other track to slip over a stud in the floor. They bolt up to the seat frame with one bolt front and rear.
There are two different styles/positions of adjuster handle but either will work.
Turns out that I do not have the correct seat tracks. The last Jetfire I picked up I knew did not have the original seats but they were the original style. Well, whatever they took them out of was no a 61-63 f-85 or Buick because the tracks are completely different.