I'm struggling between 4.56 and 4.88 on the gearing on these 34.6" tires. I love rolling across the roads at 64 mph at about 2.1K rpms, but . . I'd love to get more advice on this. I have only done the standard FAQ reading in 80 Tech, so . .not a huge bit of research here to date.
On 33" like the 285/75r16, have you considered the 4.56 instead?
My '85 4Runner had the 5.29 and 33's and it was MISERABLE, but that is a whole different story

It would bog down on some angles that you would think, "damn man, I got to put up with a max speed of 64 and it still bogs down." At some angle, your gearing just doesn't do much and your engine is the issue.