vent window frame removal?

mine has three screws on the top front edge of the door above the vent window and into the vent window frame. also the bolt through the bottom covered by a removeable plastic cap. I had to remove the door window regulator as well so that the main window was free to slide.

I hope that helped

Keep in mind mine is in a 4 door 76 dart. I just replaced the drivers vent window with one from a member here.