Buzz,
It will be a great project! I love tearing into almost as old #239
If I were you…
Rebuild the suspension,
Like xlr8or said, Check the steering, universal/rag joint, steering rack, tie rod ends and ball joints.
Replace all the control arm bushings (front and rear)
Check all the pivot and shock mount bolts for wear/damage, replace as necessary
(I replace all the bolts/nuts I remove with SAE/NAS locking equiv.)
Do a coil-over and shock mount upgrade
Replace the Sway bar bushings, mounts and end links
Add a rear sway bar if you don’t have one
Take it to a good race shop near you and have it corner weighted, ride ht adjusted, ft and rr alignment and camber done
Brakes:
This is one of my big things. The early SPF brakes just plain suck.
Replacing the calipers and rotors with Wilwood parts is easy enough and will help, a little. However it’s the power booster/master cylinder combo and horrifically inadequate pedal ratio that really screws the pouch. And as far as I know, nobody makes a “kit” to correct it, everything has to be fabricated. It can be done, just takes a little time.
But that is where the big difference in brake performance comes from.
Id be happy to help you if you decide to go that way.
Jason