Headliner help

I am switching the headliner in my 72 dart to a earlier bow style. The roof frame is not set up to mount the retainng clips. I know the framing in earlier darts had elongated holes in each bow location... mine has three holes in each location. View attachment 2012-10-23_11-52-05_107.jpg Can someone please take some pics and measurements from a bow style roof frame for me. Any help will be greatly appreciated, thanks.