[68Timber]

I had the luxury of putting mine in with the vents out. I put the one roller in its track in the door then loosely bolted it in, ran the regulator all the way up out of the door and attached the glass. If you're going to leave the vents in, I think it was Old rusty C10 that posted recently that you can loosen the bottom of the tracks in the door and replace the glass without removing the vent assembly. I don't know if that works but I get to try it soon myself. I bent a regulator and get to replace it. The fun never ends.