Mostly stock 340 engine what Spark plugs

I was always one to use Champions in my Mopars. Till I couldn't get the
Duster to idle good. Was looking on moparts racing site and seen the guys
using Autolites. I put them in the Duster and haven't had any problems
after that point. Use the Autolites.

oh man champions suck. haven't run them since the 80's..lol


been running autolites all this time. right now i have NGK in my car and they have been great too. saw a lot of guys using the NGK so i figured i'd try them..