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I'll check the spark plugs, that's a great idea. I'm running a Holley Street Avenger 670 and it had 66/68 jets in it. The plugs were pretty black so I jetted it down one to 65/67. I may need to go one lower, but I'm more inclined to take it to Westech and have it dyno tuned when I get rid of this fluttering noise. I'm just hoping it's not a flattened lobe.
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