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rockfla · 11-20-2019, 07:55 AM

IS there a preferred "Brand" spark plug for your flathead? What prompts the question is my best friend is a "Willys" guy and all the guy's on his support page prefer the Champion J8 for the Willys Jeeps!! They say they run best with them.....SO before I go buy a new set.... is there a particular brand like "Champion that is preferred say over Autolite??? Flathead in question is a 1939 Merc.

11-20-2019, 07:55 AM	#1
rockfla Senior Member Join Date: Mar 2014 Location: Jacksonville FL Posts: 3,956	Spark plug preference...Curious IS there a preferred "Brand" spark plug for your flathead? What prompts the question is my best friend is a "Willys" guy and all the guy's on his support page prefer the Champion J8 for the Willys Jeeps!! They say they run best with them.....SO before I go buy a new set.... is there a particular brand like "Champion that is preferred say over Autolite??? Flathead in question is a 1939 Merc.