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 FeedsCGM found clutch issues behind its recent Funny Car traction problems. The team heads to St. Louis ready to pick up another win.
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Jim Dunn has been burning nitro for over 70 years. Dunn has been selected to join the West Coast Stock Car/Motorsports HOF.
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Matt Hagan brings the Funny Car points lead to St. Louis. Leah Pruett debuts the Pellera dragster at World Wide Technology Raceway.
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John Force Racing drivers are fighting to advance in the Countdown points. Here's a look at how the team is approaching St. Louis.
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Shawn Langdon, Doug Kalitta, and J.R. Todd are ready to go rounds in St. Louis. The Kalitta teams could double up this weekend in St. Louis.
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