8 3/4" How Strong?

.....and if you have a typical front-heavy weight balance, a little rear-end weight won't hurt.
And since aluminum 8 3/4 centers haven't been made for about 20 (or is it more?) years, an aluminum nine center is probably about a quarter of the money of an 8 3/4.
215 bucks from US Powertrain. Aluminum 9" case. Free shippin, even. lol