This article on '67 vent window frame/seal restoration popped up in this week's Amos Automotive update; mouse on each photo after the first one and a caption will pop up:
http://www.amosauto.com/Articles/Gm/Tech/just-venting
This is perfect timing. I have new rubber for my 67 vents and am at the point of replacing them along with new handles.
This is the perfect exploded view to work by.
Thanks,
Mike