it gets about the same miles as it does gallons, or a 1 to one ratio!!
Actually it gets closer to eleven miles to the gallon unless your pulling a trailer.. running 9 tons to the scrap yard it got a whopping 4 mpg, but let me tell you, it PULLED that load impressively, and, thats what I built the engine to do. Its designed as a TRUCK motor. Torque curve starts at about 2800 RPM and runs up to 4600 RPM. You have to shift down out of Overdrive into third, but once in Third you no longer have to shift, big hill or small hill it goes. It also has the components to handle the rpms if you need them. I have more in the motor than the truck is worth. i would be better off stuffing an old 427 tall deck I have into it and selling the new engine outright for about 5 K, then selling the truck for about 1500 dollars. Then there would be a correct value for both seller and buyer.
I love my trucks. Old, beat up, yeah, kinda like I am, and still going! The body shop here in town is INUNDATED with 08, 09, 2010 etc trucks that are ALREADY ROTTED OUT.. rear fenders are SHOT, so they are getting new quarters and cab corners...
That 94 Dually has one cab corner thats gone. I am sorry, but I really feel that anyone buying a new truck today is a fool.. 50K to 70K for a GOOD work truck, is too much. Actually, I think 40K is too much.. 20K is closer to value for the intended purpose.. Give me a NEW truck, with rubber floor mats, Hand roll up windows, an AM FM Radio, AC and 4x4.. No fancy carpeting, Blue tooth, electic gizmoes and GPS etc,, dont need it, dont want it... A TRUCK is for throwing wood in, for pulling a fence tight, for pulling a trailer with horses or cows, and for bouncing through fields to check fences, and fix them.. NOT for City people to show off with........... ok, I'll shut up now....