Spark plug gap, 66 442

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July 17th, 2014, 04:02 PM

bobfo1

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Join Date: Jun 2011

Posts: 98

Spark plug gap, 66 442

I have a 66 442 with a 455 olds engine. It has HEI ignition. What should I set the spark plug gap at?
thanx

July 17th, 2014, 06:06 PM

Fun71

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Join Date: Feb 2013

Location: Phoenix, AZ

Posts: 14,701

I set the gap to ~.040" with HEI.

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