for track, i ran a 22, 25 mm F to R setup. pretty neutral. if you are going to run on a dirt track, you will want to run about an 18 front 21 rear. you want your car to have a bit more sway so you have more bite on the outside tires
terminator v8 in an SVT focus (soon to be boosted @ 20 PSI with a 2.9 L Kenne Belle on Corn!!!
(750 rwp and low 10 second focus, here I come!)