[C2] 1967 Spark Plug Question
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Pro
Joined: Jul 2013
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From: Florida
1967 Spark Plug Question
I have a 67 327-350 and I want to do a tune up right now it has NGK XR 5 V-Power plugs and I'm trying to find out what AC plug would be correct for this motor
Thanks for any help you can give
Pat
Thanks for any help you can give
Pat
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2024 C1 of the Year Finalist - Unmodified
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R45S AC or 85 Autolite is a good plug to use.
I use the Autolite in all my cars.
I use the Autolite in all my cars.
Race Director
Joined: May 2000
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Unless you're having your car judged, there's no reason to use AC plugs. I don't even know who makes them. AC Delco is just a marketing outfit that contacts with the lowest bidder to manufacture parts.
Back in the day the AC 45, which was one heat range hotter than the OE 44 was more resistant to fouling, but it's long out of production and all currently available AC plugs are resistor type.
Non-resistor equivalents to the AC 45 are the NGK B4 and Denso W14-U.
Duke
Back in the day the AC 45, which was one heat range hotter than the OE 44 was more resistant to fouling, but it's long out of production and all currently available AC plugs are resistor type.
Non-resistor equivalents to the AC 45 are the NGK B4 and Denso W14-U.
Duke
1967 Pedal Car Champion
Joined: Mar 2020
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False sense of brand patriotism... Your AC Delcos are likely made in China while the NGKs are likely from West Virginia. Jus' sayin' time has flip-flopped loyalties on us.
Last edited by barkingrats; May 30, 2022 at 05:32 PM.
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From: Florida