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Re: Fuel efficiency...what MPG do you get?
Bout 12 with a 454, t400 combo 4.56 gears and 33 x 12.5 tyres running straight propane, average driving conditions, hope to improve that with the addition of the gear vendors I have
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 1979 C20 pickup 454 big block turbo 400, 4.56 gears
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