Helps a lot, thanks.
I was talking to another 'Bolter that has a LOT of experience with these trucks. He said that every one of these trucks he's ever taken apart that was still factory original, the window channel does NOT go all the way up and over the door. It stops at approximately the height where the channel begins to curve over the top of the glass. If you look at the diagrams in the factory service manuals it shows it this way.
My first question was probably the same as what you're thinking - wouldn't this allow for a lot of road noise? Probably yes but with an opening windshield and cowl vent I doubt this adds too much to the noise they put out.
