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  1. funknut

    Looking for suggestions. Uneven spark plug coloring. Some are super dark, some look good?

    A bit of background to start: 440, .030 over, 10.5:1 compression 440 source aluminum heads. Performer RPM intake, Edelbrock 1413 (800 cfm, mechanical secondaries, e-choke), spark plugs are NGK BKR5E and probably have < 600 miles on them. I haven't touched the carb since I got the car, so I...
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