Found out about this on Facebook!!
8)Looking for a custom NASCAR Style rear spoiler for your G-body? It would $400 unfinshed (unpainted) includes mounting hardware, then add shipping.. and it does function any where above 65-70mph it will push the rear end down. Call Petty's Garage @ (336) 498-3745. Ask for Mark. Tell him Jim Boyle sent ya. This is what it looks like painted to match the car.