Spark plug questions
I guess this is for all of you with 2000+ SSEi'*.
I know the stock plug in Autolites is a 605, but I see that most of you with 3.4 SC pulleys are running Autolite 104s. Wouldn't one range colder be a 604? I ask because I'm curious, and want to get the right ones in my car. Wouldn't a 104 be shorter than a 604? My pulley just came today, and if I have the weekend off, I'm giving her a tune up and changing the pulley. One of my buddies also suggested NGK plugs over Autolites. Do any of you have experience with which seems to perform the best? Any advice / Info is appriciated.