Nice looking car!
Tires and even air pressure can have a big effect on road feel. Try 32 psi and see if that changes the feel.
KYB Gas-a-just shocks would be the next level up for performance. They're about $33 each from Rockauto.
Edelbrock and Bilsteins would be another level up and at a higher cost.
EDIT: Edelbrock no longer makes shocks, their tooling was sold to QA-1 about 2 years ago.
For even better performance, consider a larger front sway bar, adding a rear sway bar, and upgrading to a fast-ratio steering box.... those changes will make a HUGE difference in how the car drives!
You can try searching on other GM a-body forums such as
www.Chevelles.net and
www.Performanceyears.com