My old S/P car had single adjustable steel Koni coil overs on the frontend with A arms, I switch them to a set of Afco 36-way double adjustable aluminum coil overs and it help that car 60 Ft better and react quicker once I got them adjusted to what that car needed: work:
I agree on getting rid of the air shocks and better front shocks, you will maybe have fun tuning them and go quicker with better reaction times