That's right, pushing out the rear wheels has the similar effect as increasing torsion rate on the front swaybar. If you are going to push out the rear, push out the front as well.
If you want more over steer bias you want to pushout the front and leave the rear as is.
Another thing to note about the Kics is that you don't need any special tools. Just place on the hub, tighten down the special low profile lugs (kit comes with adapter), place your stock wheel, tighten down wheels using your stock lugs.