Quote Originally Posted by IC2 View Post
Don - try the current OEMs which are Motorcraft/Autolite. Federal-Mogul who now owns Champion evidently does not make the same quality plug they used to years ago when I would ONLY run them in any vehicle. The Ford truck site folks dislike the current Champions, and my last few encounters with then in anything Ford have been less then satisfactory(my 'long gone 'bucket and my last 2 p/u trucks).
I've never been a Champion fan, mostly used Motorcraft over the years in my Ford stuff, and NGK in everything else. I only used Champions this time because I have Edelbrock aluminum heads and when I called them for their plug recommendation that is what they said they use in these heads, so rather than interchange to another brand I just went with it.

I probably have 350 miles total on this new motor, and when I just pulled the plugs they look really good. The back ones are slightly darker than the front cylinders, but that is because my 2 x 4 intake tends to run on the back carb mostly, and those plugs get the bulk of the gas. Even the cylinders and combustion chambers of the heads look surprisingly clean.........I really expected more carbon because of being over carbed, but not so.

For now I think I'll just put the Champions back in for a while since they seem to be performing pretty well, then down the road I may go to the Motorsports.

Don