How do you change headlight bulb in a Pontiac Trans am 1978 with a sealed beam unit?

To change the headlight bulb in a 1978 Pontiac Trans Am with a sealed beam unit, first, open the hood and locate the headlight assembly. Remove the retaining ring or clips that hold the sealed beam unit in place, then carefully pull the old unit out. Insert the new sealed beam headlight, ensuring it is seated properly, and secure it with the retaining ring or clips. Finally, test the headlight to ensure it is functioning correctly before closing the hood.