Re: AC Delco R43 Spark Plugs
R43's were the standard plug installed at the factory for all 69 Z28's. In 1970 they went to the R44 for the 350 LT1 Z28's. Here in the Chi Town burbs everyone I know seems to prefere the NGK XR5 over anything..I have them in my 70 Z and my very good friend also runs them in his 69 Z. I believe that Darren (Darren X33) also runs them in his 69 Z.
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1970Camaro Z28
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