Kevin.
... and besides,, if someone truly has a 'bullet proof' rear end of any flavor,,, All I can say is you ain't making enough power and don't have enough traction!!! Given enough power you can destroy just about anything. After I twisted 1 Strange axle, then snapped another, Strange themselves sent me to the Dutchman and he forged me a couple out of his special allow. Yup,, here it is.
http://small-block-chevy.com/images/662010/axle2.JPG (big picture)
That's what let go in initial testing of the ol 66 in Feb.
A set of Mark Williams axles in there now. Big tires,,, dead hooking... Somethings gonna give. Again fortifying my point... nothing is 'bulletproof'