Well i think i did this before i removed the engine but i only just rememeberd it. I found info on this part scarce as well. I actually ordered new rubbers with the chrome trim from west coast metric, fast shipping from the US by fedEx so its trackable, and fairly good prices.
So thats the back window (I didnt take pics of the front or the side woops but its all the same)
MY father had this super duper tool to cut rubber, it cut the rubber and didnt scratch the glass. As i didnt need to keep the seals i just cut parralell to the glass and after a few cuts the rubber came out and the glass was removable, i would suggest having two people here as you dont really want to smash the glass (its been 40 years and it doesnt even have a chip).
Front window out
Side window out.
Now for the headlining removal i took a video explaining what i did and what i found, as again i couldnt see to much of this documented.
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And thats it really for this post
Thats behind the seat removal