1988 Chevy Nova no power

You have two things against you right from the start. It is a 4 cylinder, and it has very high mileage. I would take it to a repair shop, I'm sure you have one you do some business with,
have them put the car on a scope, or scanner, and this will give you the low down on whatever the car needs. Good luck, and I hope this info helps. Mickey-d