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 FeedsPistons In The Pines takes racers on an epic adventure through the state of Maine. Check out who won at this drag-and-drive event here.
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Shane Gray is making his return to NHRA racing in 2027. Gray will pilot a Pro Mod for Elite Motorsports next season.
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Doug Herbert is chasing 500 mph at Bonneville. Herbert will be driving the 5,000 HP "THE BEAST NextGen" on the salt in 2027.
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The Heads Up Hustle puts a new twist on the drag-and-drive race format. Racers get to experience heads up racing after two days of driving.
It's no small task getting a nitro clutch ready for a pass. Chad Green Motorsports shows us what goes into getting a nitro clutch rebuilt.
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Texan Rick Bailey Is All-In On Drag Racing
Known for his fast heads-up cars, Rick Bailey is adding a 1955 Chevrolet built for the fast-growing 5.30 index class.
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