The 3.91 in my Runner sucks on the highway, even with 275 R60 15 tires.

My Boss 302 with 3.91s wasn’t much better 25 years ago. Great for getting ice cream, but not on the highway

Unless you have an overdrive transmission, stick with something like 3,23 gears.

As to the limp wrist comment, why do you think all the performance cars have overdrive transmissions now?