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Spark Plugs

During my stint behind the parts counter, the NGK literature gave the
expanded surface area (created by the V notch), put out a bigger spark
(in terms of area, if you can call it that).  Splitfire tried to copy
the idea, but ran into NGK patent rights, and created the split tang and
a $ 5.00 piece of junk.  My 0.02

Has anybody thought about the ol' drag racing trick of indexing the