Dedicated to the Promotion and Preservation of American Muscle Cars, Dealer built Supercars and COPO cars. |
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#3
06-01-2007, 05:46 PM
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Re: NGK Plugs
My 291 heads use AC-Delco R43T originally.
Last year Rob C. helped me determine the NGK equivalent for those was UR5,stock #2771. These are magnificent spark plugs and REALLY wake up the combustion chamber for me.  
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