I just replaced all the roll up and vent glass weatherstripping and felt in a 1956 Chev Apache I'm restoring. Although I searched and Googled, I just never found a decent thread on the subject.
After hours of tries and re-tries, installs and removals, I finally got it all done and working as it should. Then I tackled the drivers door!! Tricky stuff for sure.
Anyways, it's all in my blog, specifically here:
'56 Chev Truck Door Glass Wetherstrip and runner felt installation I hope it saves someone some time!