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  1. D

    Spark plug reading and Edelbrock RPM manifold

    I running an edelbrock rpm performer intake manifold on a stroke 383 to 450 with aluminum heads with an 830 quick fuel carb. At first out of the box engine was running very rich so I changed the idle fuel restrictors a few sizes smaller and main jets from 78 to 71 .My idle AFR at idle is 14.5 My...
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