It's a pretty time-consuming job, and you'll need some special tools AND rivets to replace the pivot rivets in the windows. You need to work on a good sturdy workbench. I had a video and will see if I can post it- done by a professional restorer- to show you how it's done correctly. I've done mine and I must say- I hope I don't have to do another set...
The door panel must be removed. The main window run and seals must be removed. The main window can stay, but I took mine out to make things easier. The window regulator and motor must come out. The vent is held in with two screws found at the top of the door frame. Then the vent can be removed and taken to the bench for replacement of the seal. The window sash actually has to come apart to replace the seal, and it's riveted together. I just got called to dinner, but will see if that video is in my favorites and post it. Get a cup of coffee. It's a long video. The vent replacement seals are done essentially the same way on our trucks.
http://drjsrestorationrx.com/techlinks/
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