Make sure the right springs go on the right shocks. Ride height will have to be adjusted in a couple of iterations until it's right. It will settle a bit, too, so you may have to raise it after a day or two. Get an alignment afterward. As for adjusting the damping, start full soft and increase the fronts by quarter turns until the front isn't bouncy any more, then do the same thing for the rears. Of course it's more complicated than this for the track, but this will be fine for the street.
Overdamped means you'll be skittish over bumps and the ride will be jarring. Underdamped means the car will porpoise and kind of skip along the road in a bouncy fashion.
BTW, randall, is the 106k in your sig 106k miles, or 106k dead presidents?
