Basic procedures are required to revive an automobile that spent 30 years in a barn.
To check the quality and level of the oil, pull the dipstick.
Check for coolant beneath the radiator cap.
Try turning the engine manually while holding a breaker bar against the crankshaft bolt.
Continue with a few more thorough checks if these tests are successful.
A fresh battery is another something we advise keeping on hand in case you need it.