I was under the impression that the original Viper had windows...you just couldn't roll them down. It wouldn't make sense not to have windows at all, the drag would likely outweight the performance gained by the tiny bit of weight taken out.
Submitted for the approval of the Midnight Society
The original Viper RT/10 from '92 to '96 had snap in side curtains instead of windows. It was an ACTUAL roadster, in the form of the original 289/427 Cobra, Porsche speedster, Austin Healey 100/4,, Bugeye Sprite, and more.
I'm not mean. You're just a wuss.