We are working on a 69 RR with power windows and the rear quarter glass won't line up. The top tips toward the inside of the car too far and won't slide into the groove of the rubber seal. The front channel is adjusted (bottom adjusted all the way in and the top adjusted all the way out) to get the tilt but the window isn't cooperating. We removed the lower bracket of the front channel and pulled the track toward the inside of the car to double check and the window barely moved. The bottom of the glass is already pressing against the outside cat whiskers. Any ideas?