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Warrens69GMC · 05-06-2023, 10:21 PM

Those are 2 different spark plugs. Do you have tapered seats in the heads or do you have one with a flat face for a gasket?

Or 2 different heads?

Do you have the casting number for the heads?

05-06-2023, 10:21 PM	#2
Warrens69GMC Registered User Join Date: Jan 2003 Location: Safford,AZ Posts: 3,613	Re: Question about spark plugs Those are 2 different spark plugs. Do you have tapered seats in the heads or do you have one with a flat face for a gasket? Or 2 different heads? Do you have the casting number for the heads?