Seat tracks: What do they go to

[FrankieD61]

Hey all, I just finished up my interior and I have these seat tracks pictured below. The guy I bought them from said they go to my truck (91, k1500, reg cab). He said they'd work with bucket seats. Dead wrong, he was... Or just a flat out liar. 250 for the pair, each.. I was on a frenzy of buying what I could when I was in the planning stages of this project, and luckily the guy who I bought the seats from came through with a color matched set of tracks.

Anyway, if anyone knows what these actually belong to, let me know.