Thread: Spark Plug Help
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Old 05-21-2008, 08:48 PM
Chevy454 Chevy454 is offline
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Default 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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