[bobcowan]

Your fronts are most likely too light. You should increase your front spring rate. But how much depends on how your wheel rate calculates out. My front springs are 750#. But my wheel rate calculates to 240#.

Springs add wheel rate all the time. Sway bars add wheel rate at certain times. There are a couple of different theories about how to balance springs and bars. Personally, I like a medium to heavy spring, and then balance that with a medium to light bar. For a variety or reasons, that seems to work best with a light weight car, with relativly low unsprung weight. But your 9" rear is a bit heavy, so you have a little more leeway there.

Start by calculating your suspension frequency. Get it up around 1.7'ish and see how you like it. You'll get nice handeling without a bone jarring ride. Drive it around for a while before making any other changes.

If you like the ride quality but want better cornering, add bars.

A note about springs. There is a huge difference between a $25 spring and a $75 spring. They may both be rated at 600#, but one will feel considerably different than the other. I highly recommend that you only use an Eibach spring.

I would not recommend an adjustable shock just yet. They are very expensive, and you haven't established your baseline just yet. As long as your current shocks have been valved for your car, leave them alone for now.