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Need some suggestions what plug to use in a 440+6 509 mopar cam 10:1 ported 906 head engine Going to be street only.

Thank you

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I would look at and use both the Autolite 74 or #AR73 or # 84 or 83(Autolite resitor plugs with the asme heat range as the 73 and 74), if available, and the Champion RJ10YC Colder heat range is better when using a iron head and pump gas like your talking about