Transfer and Rear-end durability?

[Pushit2.0]

I broke a 4bolt rear axel at 500whp once... I would think it was a fluke or something like that. But I would worry about the center diff and tire / suspension selection first. Also Driveshaft Shop sells an upgraded aluminum drive shaft (replaces the front 2 sections) and has a larger yolk and longer splines going into the t-case. Also there are upgaded rear axels, all of which I am sure Shep runs in his car.

~John