Check the 302's to be sure they are not cracked, usually visible between valves. If all is well, match roof and middle divider of intake only, sides and roof of exhaust only. Smooth transition in bowl, both intake and exhaust. Intake is suction, Exhaust is under pressure. Get a good valve job. Your engine should start within one revolution. Mill the heads .020 block side, .019 intake side. Use Felpro Head Gaskets and do not use steel shim intake gaskets. Don't swap gears. For your purpose they are perfect.
