I removed the wing windows in my 50 Ply wagon. There is a structural part of the door and hinge inside the doors on mine. I had the glass guy come to my shop and they had to cut the one piece glass with a cut out shaped like a hook at the front of the glass. It had to be cut that way to not come into contact with that piece of structure part of the door. I also got a wing window replacement piece from Julianos. It comes with a new piece of channel to help guide the glass. Hope all goes well for your car.