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What is the correct spark plug gap setting for a 1991 Chevy 454 HEI engine?

The correct spark plug gap for a 1991 Chevy 454 engine with HEI ignition is generally .035" to .045". However, always check your owner's manual or a reliable repair manual specific to your 1991 Chevy 454 to confirm the exact recommended gap. The gap might vary slightly depending on the specific application and the type of spark plugs used.
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