Welcome GG. Im sure if you take a look around the forums you will find plenty of material for modifications to your Gp. Aswell many forum members glad to help you out. Im not that sure on a gp club in/around Miami. I know there is one in Tampa Bay http://tbcgp.clubgp.com/ and one in titled as a South Florida Gp Club http://p218.ezboard.com/bsouthfloridagrandprixclub32604 . hope those links help. Till next time.