![]() Dedicated to the Promotion and Preservation of American Muscle Cars, Dealer built Supercars and COPO cars. |
#4
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I have used NGK XR5 stock #5953 in my 68 Z with no fouling problems. ![]() [/ QUOTE ] The XR5 would be the standard (non-race) version of the R5670 (race) plug...both are good plugs. |
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