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Discussion Starter #1
I've got a set of gt-40p heads that I was planning running Autolite 104 plugs, but I found a new package of Autolite 103's in my garage. I know these are colder than the 104's, but will it hurt performance running them? I don't plan on running nitrous anytime...
 

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Discussion Starter #3
racer4015 said:
they will be fine.
Thanks...but have another question.

Would performance be better with the 104's? They're only $8, so i'd rather get them now them spend the time changing them later.
 
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