A body bucket seat help.

Of the 4 track pieces, one changed (shorter) when adition of cat converter forced a floor pan change. 1974 I think.

Yea im thinking that might be the flat one with the metal floor spacer on it. But the track adjustment knobs are diffrent on both seats. Looks like someone put a bench seat track on one side maybe? I looked under my duster and I didnt see a cat converter.