73 Duster bucket seat location

Hi all! I am trying to set the holes in my new floorpan for bucket seats. it has no holes in it and im having concerns. The underside brace has 2 holes. I always thought that the ridge in the floor, near the door sill, is the std location for the left rail. At that location, my seat adjustor will hit the door.
I'M not exactly sure that I even have the correct seat rails. Do the bucket seats get mounted in a different location than the bench seats? Any location guidance and or pictures would be appreciated.
Thanks Paul