Milage? You're kidding right? I'd guess somewhere in the range of an M1 Abrahms tank! :p
If it were me,...
I'd say get a 55 gallon drum with a hand-op fuel pump, strap it in the fwd. left corner of the bed. Top off the truck and the drum, grab a thermos of coffee, & have a nice trip.
I did some number crunching on my nifty gear ratio calculator for my beastie once, gave me a blazin top speed of 53MPH in my '56 370 dump. That was being conservative since I didn't have exact numbers tho.
BTW, if any of you folks wanna give me the diameter of the tire, the gear ratio/s for your rear end, the ratio for your highest gear (or all of them if ya have em), and the RPM limit of the engine, I can get you the exact speed limitations for your rig.
1956 GMC 370 dump " 'Tater "1970 VW Volksrod "the Black Bomber"
2007 Chevy Avalanche
2020 Jeep Cherokee Trailhawk,
2005 Harley Davidson FLHTCUI
I dig all cars, old and new, whether they were hammered out of American iron, German steel, or Japanese tin cans. Being unable to appreciate them all is missing out on a world of great things.
But thats just MY opinion! :P
