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Old 08-08-2016, 02:54 AM
Survivor 69/Z28 Survivor 69/Z28 is offline
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Join Date: Jan 2007
Location: Texas
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Default Re: L78 Hydrolic Roller

I have been using a NGK racing plug with heat range at 6 and have tried 7.
Called NGK last week and their "performance" guy told me that I should use an Iridium IX plug with extended tip with heat range at 6. Went and bought some but have not tried them yet.
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1970 Chevelle SS LS5 - 79k original miles, Tripple Black, build sheet
1969 Camaro SS/RS X22 - 548 with 5 spd, Hugger Orange, Houdstooth Interior
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