new here, question about improving handling
If you want to make your 40+ year old car handle like a new one, please read the numerous threads in this Suspension, Steering, and Chassis category. There is a lot of great info posted there from guys that have "been there and done that."
From doing just that, I have determined that some simple things could be done to improve handling:
Good wide radial tires
Disc brakes
Thicker torsion bars
Sway bar - fronts affect handling the most, but rears also help greatly
Rebuild worn front-end suspension components, i.e. ball joints, etc.
The next level might be:
Tubular UCAs and reinforced lowers
Reinforced K-frame
Sub-frame connectors
Thicker front suspension components
Fast ratio steering
These are just a couple of ideas to mull over. Again, read back through the threads; there is very good info there.