Hello, I am wondering what spark plugs go into my 228 ci L6. I am having conflicting information given to me.
Old GMC Trucks says AC Delco R43 (can only find online)
Autozone website says Autolite 306 and Champion 871 (not available)
Napa told me Autolite 303 and Champion 871
Also, what is the difference between a regular plug and a resistor plug?
All I want to do is go to the part store and buy my plugs, wires and dist cap.
Anybody have the correct part numbers? I would appreciate it. Thanks!
