Just wanted to post this as a follow-up. The link was a good source of information, and it maybe all you have to do with some doors. With the rear door of my '76 Nova, I had to unbolt the post between the roll down glass and the smaller fixed glass. The post has to be moved around some to allow enough clearance for the roll up glass to be either removed or installed into the door. Just removing the weather stripping will not give you enough clearance to get the glass in or out. Just thought I'd give a heads up on someone working on the same door as mine.
docshank