shoe box Jack
Senior Member
looking for the # off the NGK plug. I was told that the ngk spark plugs are the best to use in a 239 ford??. JACK.
NGK B6L the best I have ever run. If you're running stock and 6 volt like me I like .025 gap.
That's what happens when you attempt to use the wrong reach plugs for the application.On Navarro and Offy heads that I have B6L plugs are too short and very prone to fouling .....