Remove the stock spring spacers if they are still in there after thirty years. This will lower the car to the intended ride height as designed by Giampaolo Dallara.
Bleed the cooling system to make sure all air bubbles are removed.
Re-route overflow tank vent hose to exit behind the rear wheel.
Add two heater hose shut-off valves in the engine compartment to assist the A/C in actually cooling the cabin.