It's been a while since I messed with them, but I think I recall there may be some slight differences in lengths. I'll have to review some old posts when I get more time and perhaps you can try to dig them up as well as this topic was discussed some time back (geez, nearly a year ago?..lol, man, I have been out of the loop for a while..)
As noted in the thread, the dogbones do work but require a little modification to the stock diffs. The other option is to use the 18T diffs in conjunction with the dogbones for better fitment without modification.