Any extra seatbelt mounting holes on a 70 Duster

I just did some Duster work. I was amazed to see that the driver's bucket seat edge is way more in towards the middle of the car. Not sure why, both my new buckets from a 74 Dart were put in using the 2 outer holes that are already there in the reinforcing bracket for both outside rails. I had only worked on the passenger side and assumed the same issue I had on the passenger side.

SO that was a pleasant surprise on the driver's side, I just bolted in the lap belt retractor. When the driver seat is all the way back the retractor just barely rubs the left rear corner of the seat, but I can live with that!!!

Now the passenger side is a different story. Not sure why this seat is over to the door so far. It seems to be the same width as the driver's seat and the arm rest/buddy seat in the middle fits in perfectly. Is the driver's side on the floor up to the hump a little wider maybe for driver comfort??

The Big E