If anyone doesn't believe that 8 3/4 cases don't flex because of the lack of pinion support, look at the housing & the damage to it from the ring gear shearing teeth. This was done prior to the brace being welded to the housing. Dry hops, on & off the throttle at 20-30mph in 1st on the street showing off in my younger years claimed the ring gear that did this. The brace covers the worst part, not sure why the cap didn't break.
I am still running the 8 3/4 because i still have quite a few spare cases & only get to the track 1-2 times a year. As mentioned previously, billet caps & braces are just band-aids ... especially on heavy BB cars.
A 60 is in the future for my car, because it's stronger/more dependable.