We've had a Dana in some fairly powerful and heavy cars without issue.

Starting from scratch, I wouldn't waste the money on a 9in housing, but instead go right to a fabricated deal. The stock 9in is no big deal. It only becomes the "rear of choice" when it's heavily supported aftermarket is exploited and in my opinion, that includes a huge selection of housings.

You can brace a 9in housing, both inside and out, but if you are starting with nothing.....why bother??? Just get one of the good 8 million fabricated housings and fill it with the good stuff.

An S-60 is less expensive than a really good 9in and will last just fine in numerous combinations and it's slightly more efficient albeit somewhat heavier depending on the set-up.