Well I came up with the The number of turns head thread Test.
Basically there is a seat in the head for the wider portion of the plugs just above the threads to stop on. This seat, notch, ledge, whatever... read more

Mustang FeedsChad and Hunter Green are ready for their home national event. The father and son Funny Car duo are chasing the cowboy hat in Dallas.
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Fuel Altered CHAOS is coming to Tucson. 30 rowdy Fuel Altereds are ready to dance in the desert to see who can claim the crown.
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Doug Herbert's B.R.A.K.E.S. program brought racing stars together for the Race 2 Save Lives event. Check out who made laps at the race here.
Vandergriff leads John Force Racing into the Texas NHRA FallNationals. Beckman, DeJoria and Hart chase crucial Countdown points.
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Langdon chases his fifth straight Top Fuel victory at the Texas FallNationals. Doug Kalitta and J.R. Todd fight for championship points.
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Matt Hagan And Leah Pruett Have Championship Business To Handle In Texas
Matt Hagan is working towards picking up another NHRA Funny Car championship. Leah Pruett has a shot to make waves in Top Fuel.
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