Thread: Single or dual quad 427 s/o?
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Old 10-04-2011, 06:58 PM
Bobcat Bobcat is offline
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Join Date: Apr 2007
Cobra Make, Engine: # 757 ERA 427 SC , 482 Al. big block
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Flygirl ... good link that Dwight gave you , but be advised that it applies only if you do WOT runs and then shut off clean . However , it gives you enough that you can get in the ballpark and is a great primer on plug reading in general .
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