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What size spark plugs for a 1982 corvette?

A 1982 Corvette, depending on the engine (L48 350 or L83 350), typically uses AC Delco R45TS or Champion RN12YC spark plugs. However, it's crucial to double-check your owner's manual for the exact specification recommended by Chevrolet for your specific engine. The engine code (L48 or L83) should be found on a sticker in the engine compartment.