Thread: Using NGK plug in my 48 Ford
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Old 01-17-2011, 09:24 AM   #2
flathead4rd
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Join Date: May 2010
Location: Michigan
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Default Re: Using NGK plug in my 48 Ford
b4L or B6L I think the 4 is a hotter plug than the 6 (someone here will correct me on that if I have it backwards). Use factory plug gap. Maybe .028 to .032.
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