['68OrangeSunshine]

Fifty-something years ago, glaziers would use a thin sheet of porous rubbe, and wet it with regular motor oil. This dissolved the rubber and it got super tacky, then cured hard with the glass in the frame. I don't think you can get that stuff anymore. I replaced the regulator in my '71 Jimmy in 2006. A friendly glass shop -- they'd just replaced my windshield and trim surround -- let me use some silicone or urethane they had. Industrial stuff. Took 24 hours to harden. We taped the drivers side window and they said not to break the tape for a day. Turned out I was on location in Phoenix, summer of course, and it was at least 114*. I don't have A/C.
The vent windows were fine then. But a PO's sloppy rivet on the drivers side tells me my vent windows were not original.
I kind of rely on winging the vents all the way out for forced air. Us Rednecks call it ''System 2-40.'' Roll down both windows and drive at least 40 MPH.
Early this spring, the tension on the drivers side vent wing went slack. No spring tension al all.* Shaft may have broken, or retaining nut fallen off. Won't know till I pull it.
A couple of years ago [pre-covid] I talked with a guy in the Northwest, who did pairs of vent windows for what I thought then was a lot. His price is double that now.
OER vent window sets are spendy now too.
*For now, Iuse a bunji cord to wing the vent out. Hassle when I have to lock the truck.