If you have to rebuild it maybe $190 wasn't such a good deal after all.
The main reason to use this rear is to save $$. If your willing and able to spend that much you may as well use the Mopar 8 3/4 and keep your car pure.
The odds are the 8 3/4 will also need to be rebuilt and cost more, therefore saving money going with the 8.8. I rebuilt my 8.8 by choice, and still have less money in it that just buying the center section of an 8 3/4. I have a little more than the amount of buying an A-body housing.