Need Help

Hi people. I'm new and I need some help. I'm looking to turn my 88 Riviera into a show car. I know I know what people are thinking, why would you turn a riv into a show car. Well who cares, its my car. Well on to the subject, i wanna know how can i get my susspensions a little lower like 3or 4 inchs. Cuz I've been looking and i cant find anything on the net on how to get it lowered. i perfer to get airbags but i went to airrides suspension's site and couldnt find anything there. so can someone help me out?