Okay then,
You could do a Edelbrock type power package (heads, cam, intake, carb, dist) with headers and a ton of detail work under the hood.
You can contact
www.vbandp.com and get their full performance plus suspension that will transfrom front and rear to fiberglass transverse springs and come with new control arms...etc so that you can rebuild the whole suspension at one time. This system lets you set ride height and stiffness.
Next, I'd get a rack and pinion conversion - the stock steering is drifty and weak in these things.
Wilwood and others now make nice bolt on brakes to upgrade - or at least go with an aluminum because the old cast ones are problematic at best.
Put a set of offset trailing arms on the rear so that you can stuff a ton of rubber in the back.