I'm pretty sure you can't run anything darker than factory tint on any windows at the races. At least if the track enforces the rules.
As discussed, scratching is a problem with lexan, or whatever brand. But there are plastic polishes that help reduce them and add protection. I use to have an aerosol can, but forgot the brand. If you write on them with shoe polish, I found isoprophyl rubbing alcohol literally melts the stuff off with minimal rubbing. Thick areas may take a few tries. But the easy wipe stuff made for dial-ins would likely work best, but more expensive.
Doesn't Cuda door glass have a slight curve, like a Challenger? Not sure about a-bodies. Bracing may be necessary for the curve as will as keeping them from pulling sway at speed. I had 1/4" on my side windows when I had a Challenger. It may be too much of an inconvenience on a street only car from a practical, maintenance and security standpoint. Can't roll 'em down on hot days and they will likely scratch.!