May I humbly suggest Air Lift's Performance air suspension? You get over 4" of ride height adjustment (goes slightly higher than stock) at the push of a button, great ride quality and racetrack proven performance!
I like to say that we do a great job of eliminating the compromises of a static drop.
http://www.airliftcompany.com/pdf/lp...evy_Camaro.pdf
Just do a forum search for Air Lift and you will find several threads that illustrate the things you can do with our suspension. Feel free to ask questions!