How to Identify 70-72 A-Body Seat Tracks

Not sure if you were asking the differences in the years or not but I have what I believe to be a set of 72 a body tracks. The partial build sheet was from a 72 Duster under the springs. They look different than any 70-74 e or 68 to 70 b that I have. I’m trying to find out if they will fit a 75 and it looks like the floor is different on one side. I may could post some pictures