Hi. Just joined. I have an 85 coup. And working on brothers 91gt automatic. Problem is car is stock except cold air fender setup. From a stop when you mash it tires break loose and soda bottle would flip out cup holder. We put on mac shorties offroad h pipe bullitts and elbows out infront of tires. Used clamps car was fine took it to friends to get welded now no bottom end tires wont break loose soda bottle doesn't move.