Looks awesome! I can safely say I wasn't expecting a one-off dash! I like the sub setup in the trunk as well. I know my car will never reach the level yours has, but I intend to try!
I don't see what is wrong with an airbag
suspension, they can perform just as well as a conventional coil spring
suspension, and this has been proven by AirRideTechnologies at several track events they have held to prove such. It may not perform as well as a GR40 system, but 95+% of mustangs will never reach that level of handling anyway. Charlie's car is a show car, period. It is not raced (as far as I know). So in a pure show car, an air bag
suspension would be very good. I also have noticed the higher stance in front, but realize why it can't be any lower. An air
suspension would allow a lower front, but still keep the car driveable whenever he leaves the show. I think people have a misconception that air
suspension is only for slamming a car to the ground, but in reality he wouldn't have to "dump" the car, he could drop it to where he thinks the stance is absolutely perfect.