How has nobody replied to this? I tried to on my phone but the forum wasn't responding so I just gave up.
DO NOT install your fuzzies first, otherwise you won't be able to get the window in (and once the fuzzies come back out, they're destroyed). The fuzzies should be the absolute last thing you assemble on your door (and one of the last things you assemble on your restoration, when it's pretty clear that your window will never have to come out again).
Put your door guts in first...handle latch and door regulator. Then install your vent window. Then you can install the door window. To install your fuzzies, you'll have to remove a rubber bumper from the bottom of the door so the window is able to roll all the way down into the door, and then you can install your beltline weatherstripping. Just a word of advice though, that rubber bumper at the bottom is an absolute bear to get back in...in fact I never was able to get mine back in.
You'll have upper and lower window stops to install as well, and honestly I don't remember what order I installed mine, but it should become obvious by looking at how everything fits together.
67 coupe with 5.0 and C4 (Viper GTS Blue, paint code PBE, since everybody asks)
69 Mach 1 428 SCJ drag pack