Hey.......thanks for the welcome.
Yeah its actually what you guys would call the "vent window"..........we call it the "quarter glass" in aust.
I already have managed to get the whole assy out [with some brute force and a lot of swearing

].......the video is exactly what i'm after...........Thanks so much.
This site / forum is fantastic.........we dont have a great deal of C10's or 20's over here in Aust..........and you guys have access to a LOT of cool aftermarket / repro stuff.
Very jealous.......thanks again for the welcome........I must update my details and put some photos up of my C10 project.