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 FeedsJohn Force Racing is ready for the Route 66 Nationals. Here's a breakdown of how each team is approaching the event.
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Street Outlaws star "Daddy Dave" Comstock has landed in some hot water. Comstock was resently arrested in New York on stalking chargers.
NewsSource Yesterday, 10:10 AM
Ron Capps and Maddi Gordon are pushing for a big weekend in Chicago. Both drivers have high expectations for the Route 66 'Nats
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The Route 66 Nationals is special for TJ Zizzo. The Chicago native is ready to put on a show for his hometown fans in Top Fuel.
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Tony Schumacher and Clay Millican have history with Route 66 Raceway. Both drivers want to add to it this weekend.
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