Jeez...I'd think that with two transfer cases, the 3.55 gear should be OK. Hell, I'd think that if there was a taller gear available, you'd be safe with that!

Of course, if you go with the 4.56 gears and dual transfer cases, you could go enter "slow truck" contests.

I'm no expert, but with that kind of torque multiplication, a fairly high gear shouldn't be an issue. And I still haven't even started painting my truck yet, but I might be able to spare a few hours here and there if you'd like some assistance...all you gotta do is ask!

Later...
Pat