with my old 305 i got 8 mpg like i drive everyday, but one week i left my foot of the gas, and got 6, i am not lying i don't see how that happened it had a quadrajet new wires, cap, rotor, and plugs was timed at factory settings with a stock rearend i think it has 3.08 gears, and also a 350 tranny, i just put in a different motor so not for sure about the mileage on it though
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