The KOH guys run 10in ring gears and 35 spline shafts in the fabricated 9in housings. Thats the only way the make them survive.
Don't forget that crank HP is different from wheel HP. Because you are using a 4l60e you will have some drive line loss, but not as much as a 4l80e or TH400. You could probably make a HP 60 last, but it would be so much easier to cut the lip on a 14 bolt and run a pinko guard and just live with it. And with that much horsepower you won't be able to keep your foot out of the stupid pedal, so the strength will be really nice.
Just stretch the jeep, With 37s you need a 100"+ wheelbase to really enjoy them.
98 4cyl TJ on 35s, armored, geared, locked, and ready to wheel
88 MJ 4.0L AW4 4wd. Stock.