Slander
Team no stickys
heck, i'm inclined to agree that the tacoma 8.4 diff would be just dandy and hold up well, in addition to being cheaper and easier to find.
going to an off the shelf 9" chunk is arguably doubling the cost of the entire build for no reason
other option would be to hit up craigslist and buy whatever axle from 8.8-14b that you can find "cheap" and have diamond build your housing around that
heck just an 8.8 would probably be more'n enough. you are talking custom shafts regardless.
I forgot about the almighty 14b, that really should be the only answer to rear axle questions!!