Be certain that the air intake is not via the plastic crap under the fenders. pull that junk and make sure the inlet will stay dry. I have a poop pipe snorkel which works, but not every1's taste.
Keep the front diff breather up dry too. Probably wouldn't hurt to silcon the elec conns near the dist.
I've had mine deep, (mud was deeper than my 31's, and water over the hood), but I was also CERTAIN it wouldn't drown. Sur nuf, it chugged right on through (locked f/r).
Worse part about mud boggin is the cleanup ... my rad was packed full, my alt is now noisy ...
I expect some skid plates will help too, but ...