This has got me stumped. I am restoring a 75 single cab with a 1/3-2/3 bench seat. I pulled the tracks etc off the driver's seat because it wasn't running smoothly and I wanted to clean it up. I'm now working on the reinstall. Everything looks like it's meant to go together and fits pretty good EXCEPT there is not enough clearance between the tracks and the base of the seat to allow the locking lever to turn properly. (Hard to explain - hopefully the photos make sense) I am sure that I am putting it back the way that it came off - this problem actually existed before I pulled it apart. Is there meant to be some sort of spacer between the tracks and the seat base? Have I gat mismatching parts? Am I doing something wrong?