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Old 10-12-2020, 11:40 AM   #25
GRADYS Performance
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Join Date: Dec 2013
Location: Columbus, Oh
Posts: 367
Re: long distance towing questions with 1978 c30 3+3 dually

454 will out pull the new 6.0 motor any day at max load. The MPG depends a Lot on the Load with either combination. Take Fuel to make power. Add a 4L80E and you have the best of both worlds.
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