You should be able to get a strut tower brace from a 92 and mount it on.
You should get polyurethane bushings / energy link moldings to replace your old ones.
Those two items (along with new struts) will make the biggest difference.
As for struts or springs, nothing really on the market afaik
Just your Monroe, Gabriel, KYB etc... for struts.
Get some slotted rotors, and performance pads and you should be set for brakes.
I don't know of any kits to replace the rear drums from 86-99.... or if it'* even possible, and if so how difficult.