1966 lemans convertable 1/4 window repairs

I have recently had the best luck in finding a 1966 Le mans convertible in very nice condition for my price range. I knew when I got it I would have several repair challenges. The left side 1/4 window is not rolling all the way up and feels like it has a broken roller or guide. I’ve never taken one apart and access to the mechanics are very limited. Does anyone know where I can find any repair videos on how to repair it as I can’t find anything with a GOOGLE search!

Sometimes, the window regulator needs lubricated. I’m sure you’d share my sentiment to have a backup unit and instructions before digging into it and attempting the repair.

Is there a local pontiac club nearby? Perhaps somebody there has done something similar.