D100 Pickup question for you:

I recently bought a 62 D100 from an old rancher in Montana and trying to do it justice. This is my 3rd Mopar project and since there's no "fordbodiesonly.com" ( I don't seem to get much from fortrucksonly.com), I'm hoping for an opinion regarding my drivetrain from the place that has helped me most with my car projects.

It's a 250 slant with a 4 speed trans. It's the 4 speed with a granny gear....which is at the heart of my question. I HATE changing what the Chrysler minds have assembled, but the granny gear is of no use to me. I grant myself the right to change things regarding safety...that's about it, but I can't help but wonder if changing the gear ratio in the differential would make the "super low" gear, to be a....more of a real 1st gear and perhaps it wouldn't sound like the rpm's are max'd out at 60 mph. I'm not building a hotrod, at all.

I would really like to keep the original trans....Does anyone have experience, or advise to share?
Your wisdom is appreciated.