<<<<<<<<<<<<< Christopher Hoffman wrote: Replace all the plugs with Autolites (#89, I think, is the correct model number) and never, ever, ever use Champions in a Mopar again. >>>>>>>>>>>> Bah humbug. If you're going to make sweeping statements like that, give us some credible reasons. Does Champion not make an appropriate heat range? Are the threads cut wrong? What? For ANY given brand of spark plug (or oil, or filters, etc) you will find someone to say to never use that brand, always use this other brand. I don't have any particular ax to grind, the majority of my cars and motorcycles are running NGK, but we do have Champions in the '73, which starts instantly and returns 18-19 mpg on the highway, with 89k on the odometer. It's a moot point in this case, as the original poster clearly had a carburetor which was dumping fuel down one primary bore. Cheers Michael Roger and Michael in San Diego 67 Crown Convertible "Moby" 73 LeBaron Coupe "La Bomba Negra" 56 Sedan