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Old 11-09-2004, 01:16 PM
Goober Goober is offline
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Join Date: Nov 2003
Location: Houston, TX
Cobra Make, Engine: Superformance #1374 with 392 RDI Stroker
Posts: 502
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Check with Edelbrock, but I think they recommend Champion Copper Plus - RC12YC Plugs for their heads. They should be the 5/8" hex size. Hope this helps. A standard 5/8" Craftsman spark plug socket should work.

Mark
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