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Spark plug gap for 1972 F-250 V8 390?

The recommended spark plug gap for a 1972 Ford F-250 with a 390 V8 is 0.035 inches (0.89 mm). However, always double-check your owner's manual or a reputable repair manual specific to your truck's year and engine for the most accurate information. Slight variations may exist depending on the specific spark plug used.