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  1. G

    Running Rough

    I have a 1969 GTX with the 440 6-pack. I recently bought the car. The manifold is an Edelbrock intake. The cam has been upgraded with about a .458 lift. The issue I am having is it will not smooth out until about 1500 - 1800 RPM's. If I increase the timing to about 19, then it does not...
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