The GTS solar wing that Al speaks about can only work on "certain" Fbodies so to speak... I
HAD one, but when you go in excess of 75+ mph on the highway, it sounds like a windtunnel cuz the air is being bounced off that thing... I actually tried to diagnose a rear problem before I realized it was the solar wing. Then then adhesive tape gave way and I just left it off.. It looked real good on my car.
Id say fix the dent in the driver 1/4 panel by the door, get matching wheels, and keep an extra $1K in the bank for when the opti blows, and you should be good to go