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Jim Arnold · 01-17-2011, 09:46 PM

Steve, I'm using the B5HS NKGs that are a bit hotter than the B6s in my old Weiand 8.5:1 heads. NKG's lower numbers are hotter than the higher numbers. The HS plug is a bit longer reach (1/16") than the L and would probably fit the older Edlebrock heads better. My new Edelbrock heads require a 3/4" reach plug and I haven't yet found a plug recommended for these new heads.

01-17-2011, 09:46 PM	#3
Jim Arnold Junior Member Join Date: May 2010 Location: Pittsburgh, PA Posts: 11	Re: Using NGK plug in my 48 Ford Steve, I'm using the B5HS NKGs that are a bit hotter than the B6s in my old Weiand 8.5:1 heads. NKG's lower numbers are hotter than the higher numbers. The HS plug is a bit longer reach (1/16") than the L and would probably fit the older Edlebrock heads better. My new Edelbrock heads require a 3/4" reach plug and I haven't yet found a plug recommended for these new heads.