I have ran Champions in both my old Mopar's with no issues. I have owned Mopar's since 1970 and have always ran Champions with no issues. I have had fouling/heat range issues with Autolites twice. Run what ever you want. If you have troubles switch to something else. IMO NGK is probably the highest quality/ best built plug out there. Plugs are like what oil or filter brand is best. Whatever works best for you.
Spot on, well said and could not have said it better. NGK plugs are number one in my book, and I ran Champions when NGK plugs was not on the shelf at our local auto parts , and ran them threw the year or two in my 318 drivers.
