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Spark Plug Help

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05-21-2008, 09:48 PM

Chevy454

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Join Date: Mar 2000

Location: Alton, MO, USA

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Re: Spark Plug Help

What heads? Just a guess, but I'd say they're *probably* an open chamber w/ tapered seat spark plug...sound about right?? If so, something in the NGK UR4 or UR5 range would work...

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