[Gargoyle]

To get the gear ratio to a more highway friendly range you could swap the gears or even swap out the complete rear end. Use something like a 14 bolt 70's rear out of a pickup with 4.11's. Or you could keep the stock rear end and find some of the 19.5 inch rims like the old bread trucks used which would require a taller tire, essentially lowering the rpm's. Those rims can be hard to find, I'm looking around now for a set to use on my '62 dually.