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yeah, running the thermoquad. but im switching to a holley 450 vacum secondary. And i drive it a 55 on the highway

Its been a long time since i have messed around with timing. Im lookin for better mileage outta my 318 in my power wagon 4x4. I remember someone telling me backing it off a degree or two from factory will improve mileage, while bumping it forward will improve power. True, false, or oppisite...