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67-72 3/4 ton with good gas mileage

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06-17-2005, 08:27 AM	#30
64fleetside Registered User Join Date: Apr 2004 Location: arkieland Posts: 1,070	The engine is simply too big & heavy & the truck(also big & heavy) has the aerodynamics of a brick, 20 mpg can't happen. I had a throttle body 91 454 3500, got 13 w/5 spd OD. Brian Last edited by 64fleetside; 06-17-2005 at 10:46 AM.

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