How do you adjust valves for 84 Ford F-150?

To adjust the valves on an '84 Ford F-150 with a 302 V8 engine, first, ensure the engine is cold. Remove the valve covers and use a feeler gauge to check the clearance between the rocker arm and the valve stem. Adjust the rocker arms using a wrench to tighten or loosen them until you achieve the specified clearance, typically around 0.002-0.006 inches for intake and 0.006-0.010 inches for exhaust. Finally, recheck the clearances after adjustments, replace the valve covers, and ensure everything is secure before starting the engine.