If you need to replace the weather stripping or seals on your windows in a 1970 B-Body Mopar, and you're wondering how in the world the vent window fits back in the door properly, there is little hidden trick.
There is a screw behind the rubber on the vertical vent window channel. When the screw is removed, you can pull the vertical piece of the vent window outward, just enough, after the whole assembly is in the door, to allow for installation of the door glass and glass guides. See photos below.
1. All glass and trim removed from the car. The vent widow was cleaned and inspected. This car, a 1970 Roadrunner, received all new glass channel run, felt, glass guides, hardware, and weatherstrip. You will need a phillips head screwdriver and likely PBR or WD40 to get the screw to loosen.