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My old diesel has a very flat BSFC curve from 800-2000 RPM. That plus its outrageous low-end torque allows me to think of truly radical gearing.
With an add-on overdrive I can cruise 70 MPH @ 1350 RPM and 60 MPH @ 1050 RPM. Aero mods will reduce the road load at these speeds and I'll have good roll-on capability even at ridiculously low RPM.
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2000 Ford F-350 SC 4x2 6 Speed Manual
4" Slam
3.08:1 gears and Gear Vendor Overdrive
Rubber Conveyor Belt Air Dam
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