My grandson just bought this '70 Dart, and asked me to help him fix the side windows. When I did my '69 I was unaware that the anti rattle was attached to the glass, so I made anti rattle that secure to the vertical track and they worked beautifully, so I am going to do his '70 dart the same way. I think it is better than a track sliding inside a track, plus when the window is down the front vertical has a finished look.