Are you in Connecticut ? I wanna see this thing.
Also, the DCOE is a strong mod, from what I understand. I have done the install before (It's crazy simple, the tuning is more time consuming).
For suspension, I'm running stock toyota springs (I got a set in the box 4 years ago) and Monroe Sensatrac. The sensatracs were great for road driving, but for autocrossing will prove to be too compressive. Plus, on a straight-line, the sensatracs will loosen up and when you dive into that high-speed corner, the car won't adjust quickly enough.
For a proven auto-crosser, stiff struts (Cusco / Bilstein groupe3 valving) will be your better bet. But when you do this, you should have all of the rust completely taken care of. If the rear fender wells are rotting, then these struts will simply snap the car in half - It happened to me !
-> Steve
If you're in CT I would like to check the car out and go over it with ya.