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 FeedsFast door slammers are coming back to Santa Pod Raceway. Here's what you can expect at THE DOORSLAMMERS race.
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Master your charging system: calculate true idle amp draw, respect the 18,000 RPM limit, and ensure a perfect engine ground.
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Kyle Loftis and 1320Video changed motorsports media. Sadly, it has been announced that Kyle has passed away.
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Former road racer J.R. Osborne's ride is wild. He's partnered with FFRE to create a unique Coyote-powered Pro Mod Mustang.
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Ron Capps has earned another honor. Capps will be inducted into the Motorsports Hall of Fame of America Class as a part of the 2027 class.
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Southeast Gassers Bring Vintage Chaos To Alabama
The Southeast Gassers hit the track in Alabama for an epic event. Here's who brought home the hardware from Holiday Raceway.
NewsSource Yesterday, 11:30 AMMore...