This is the first thing that comes to my mind.
https://www.scsgearbox.com/product-c...ransfer-cases/
Or some other transfer case. The SCS you can pretty much get any gearing you want it to have in it to get you where you want to be speed and rpm wise without getting into the front and rear axle. They're not cheap but neither is doing an axle swap, regearing 2 diffs.
Just an option from one guy