welcome Ed, 2004 hummm, well you can increase spring #'s, lighten the car abit, fiber hood race seats or lighter brakes?, widen tire & rim size abit say 275-265 on 10x18's, lower 1 -1 1/2"s, stick with current sway bars, maybe set it up with coil overs or hell just better shocks and struts. Don't forget a caster camber kit... oh I forgot to start this by how far do you want to take it? try here GTO perf or Rhys Millen motorsports