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Tires should be sidewall max (I'm running 53 psi on 50 psi max tires). Bump your timing to just before ping. If you use change octane, make sure you adjust your timing accordingly. I'd say 50% throttle acceleration will do. NEUTRAL COAST A LOT! Since you have an E4OD (overdrive) and 4.10s, then 47-50 mph should be your sweet spot. Driving technique and aerodynamics will be the next two significant increase in MPG. My intake is heated by radiator fluid from the factory - yours might be also. I think that covers it.
1989 Bronco 351W/C6 @ 15+ mpg
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