Biggest problem with scissor doors is the door itself. Even on a coupe, we have a continuous window frame. So windows up or down, they're still topped off. If they're GIVEN to you, and you were able to modify your doors to be like another door without the top, then you'd be alright.

It can be done, I just don't know how easily.
Chop top grand prix, obviously doesn't have them.

Edit: Lol, anyone notice the GPX prototype in the background? You can tell by the wheels.