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Old 03-26-2008, 02:19 PM   #18
bb1979
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Join Date: Apr 2007
Location: NSW, Australia
Posts: 205
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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