john_86stang,
I'm running Autolite 24's. I was running Autolite 25's before I went to N20. I'm not sure how your plugs and my plugs compare. But that is the plug I am running and it's one heat range colder than a stock plug. Hope this helped. If not you can find me on ICQ at 48188886 or AIM = Fordmanck or mail at fordmanck@yahoo.com. You'll get a little quicker response.
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My 94 GT