I will be curious to hear how these things hold up over time. I'm assuming they will be fine, but this is a configuration they've never really done. (BIG hp/tq, BIG tires & 4wd)
Although...if most owners are like me, the only 4 wheeling it would see is wet grass...so its probably fine.
Then again...4wd pavement launches would stress the drivetrain, and then the brakes, pretty good!
The 10R80 is what I'd keep an eye on.