I would like to turn my 82 Z-28 into a carver for autocross . What would be the best suspension upgrades to achieve this. I have already lowered the car 1" with coil adjusters. Bolted on a homemade strut tower brace. I put on 35mm poly front swaybar bushings and endlinks. I have had stock replacement struts, balljoints, shocks for 2 years. Also have 1 year-old tires Grand Am Radial G/T 235/60/15 in the rear and Grand Spirit HR+4 225/60/15 in the front.