Hi There and welcome to Chevy Chatter!! Okay, here are several things that you should do after the car has been sitting for 30 years, and they are in no particular order:
1. Drop the gas tank and have it totally boiled out. Check for rust and holes inside of the tank. Also test the sending unit when it is out of the tank to make sure that it works. Replace or recoat the floats on the sending unit.
2. Clean all fuel lines.
3. Rebuild the fuel pump
4. Drop the oil pan and thoroughly clean it, and replace the oil pan gaskets. Also add fresh oil
5. Drain the block and radiator and flush until clean. Put in a 50/50 mix of water and anti-freeze and check for leaks.
6. Rebuild the carburetor.
7. Replace the points, rotor, condenser, cap and spark plug wires on the distributor.
8. Replace the spark plugs.
9. Remove and test the coil.
10. Run a compression test after priming the system with oil.
11. Adjust the valves.
12. Clean the comm. on both the generator and starter armatures.
13. Drain and replace the rear end oil.
14. Give the car a complete lube job and check the drive train.
15. Drain and refill the transmission with fresh oil.
16. Replace the fan belt and the radiator hoses.
17. Install a fresh battery and see if you have continuity to your lights, ignition, gauges and etc. Also, check the electrolock to see if you have continuity to the points in the distributor.
18. If you are going to drive the car then new tires and tubes would be recommended.
19. Replace the valve cover gasket and the push rod cover gasket.
20. Replace the grease in the water pump grease cup and in the distributor grease cup.
21. Clean the oil pump screen.
22. Check for stuck valves before starting the engine.
23. Clean and relube the speedometer cable.
24. Lightly oil the speedometer worm and drive gear inside of the speedometer head.
Good luck with your project and let us know how you make out. If you have any questions, post them here for the answers.
