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10-29-2007, 02:18 PM

#1

jjam

Member

CRAFTSMAN

Join Date: Apr 2003

Posts: 56

Spark Plug help

I have a 540 street motor with 9.5-1 with the dart 320 heads. I'm running the NGK 4091 (R5671A-7) plugs. What gap would be best or is there a better plug. Running a 1050cfm pro system carb.

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