Duster/Dart Sport/Demon rear seat
Here is a photo of the seats in my 74 Duster after they are installed. Sorry I could not find any of the specific mounting of them. The seat back hangs on a couple of flat hooks just forward of the package tray if that makes sense. The bottom of the seat back attaches with a couple of large (maybe #10) hex head self tapping screws through the mounting tabs off the bottom of the seats. The seat bottom slides under the seat back (don't forget to pull the seatbelts out or you'll be doing it twice) then attaches at the front with a couple clips welded to the floor pan at the front of the back seat bottom. Just push hard on the front of the seat till it slips behind the bracket which will hold it in place. I hope this helps.
Cley
Here is a photo of the seats in my 74 Duster after they are installed. Sorry I could not find any of the specific mounting of them. The seat back hangs on a couple of flat hooks just forward of the package tray if that makes sense. The bottom of the seat back attaches with a couple of large (maybe #10) hex head self tapping screws through the mounting tabs off the bottom of the seats. The seat bottom slides under the seat back (don't forget to pull the seatbelts out or you'll be doing it twice) then attaches at the front with a couple clips welded to the floor pan at the front of the back seat bottom. Just push hard on the front of the seat till it slips behind the bracket which will hold it in place. I hope this helps.
Cley