are these tracks right?

I bought these buckets from someone who had them in his 70 Dart. I tried to test fit them today and the tracks are about 2 inches too narrow. Is it possible the tracks are backwards or are they just wrong? I also found out the seats are actually out of a 70 coronet/super bee. It would make sense if the tracks are also from the coronet/super bee but again the last owner told me they were installed in his Dart. I guess that doesn't mean he used the factory holes either. Any thoughts?