Not Ranked
Just went down this same path a couple of weeks ago when I did the last tuneup; after posting a forum here and talking to my engine builder and others, I ended up with Autolites.
I was running Champions, with no real problems... just thought that I might upgrade to one of the platinum-style plugs. I was steered back to a standard plug.
I also run the MSD 6AL box, but run the plug gaps smaller than the MSD manual calls for. I get a pretty good idle and crisp response on the highway at 0.045" gap... any larger and it seems to stumble a bit at speed.
My compression is about 10:1
- Dan
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