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Old 09-22-2012, 12:38 PM
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Spark plug help heat range

I'm looking to help out my friend he needs to find a plug that is overall size of the shorty accel plugs like 574s but he has ran the autolite 26 with good response but due to header clearance with the Windsor sr heads the number 6 cylinder need a overall short plug

Motor specs are
9.8 to 1
2.02 valves intake
World sr heads with 64cc
Jba shorty headers
Stroker 331 motor
750dp Holley

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Old 09-22-2012, 06:01 PM
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Spark plug help heat range

Try NGK UR4 spark plugs. This is what I got when I cross referenced Accel 276S. The Windsor sr heads recommend Accel 276S.
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