67 a body seat tracks

with a bit of modification ....mid 70 and up had four bolts from the bottom to attach the track to the frame. but early 70 and back had two bolts from the bottom and two studs on the tracks that had a nut from the topside of the track in the frame lip.

So either knock the upwards facing stud out the track and use a bolt from the bottom OR knock the welded in nut out of the frame and allow the stud to go through and use the nut from the top.