These are the Summit Racing seat adjusters $16 you can't beat that.
The two outer 1x1 inch square tubes are bolted to the tracks. the inner will be welded.
The passenger side has a 1 inch offset, because of the lever.
The inner tubes have an angle to confirm the shape of the Kirkey racing seat.
Drill markings for the studs of the adjuster.
Test fit of the seat base...
...and the seat.
DR and PA bases are finished and painted.
DR seat mounted on the base.
The pilot seat is ready to drop in. The seats are adjustable in height and lean angle.
This was the view on end of the day sitting in the seat for a few minutes and glaring at that - before cleanup and storing the project. Everyone who build one of these understand these moments