Quote:
Originally Posted by jimvette59
With the heads off the area where the spark plug lands can be lowered by using the tool from a spark plug thread repair kit.
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I like this idea, although you will be reducing the amount of threads holding the steel plug into the aluminum. Edelbrock and the others seem to work fine with 1/2" reach ("L" series) plugs, though.
I wonder if maybe there once were "M" series plugs, half way between "L"'s and "N"'s.
BTW, not recommending Champion's here, just using their thread length nomenclature because it's easy to understand. I do use Champion extended tip plugs in the Edmunds heads.