360 Spark Plugs

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.