Well, the next time you decide to use Champions. '79, get the RN12YC's which are around the same basic heat range as Autolite 65's or 66's. RN14YC's are up there in the heat range department and are actually closer to the Autolite 67's.ddgeramcharger79 said:i bought it as a stock motor so if it has any upgrades.. yay me!
as far as i could tell all the spark plugs match the normal wear spark plug in the picture.. there just smashed
its still running perfect with the autolites