How strong is an a-body 8.25 and can you make it stronger?

ok. Confirmed with a few racers I know that used these rearends in the 1980's-1990's. general consensus from them was this. Based on launches, heavy vehicles, big tires.
Stock, these could handle 350-400 hp/tq.
upgraded axles, gears and a spool would be good to 450-500 hp/tq before significant flex/carrier failure.
Most said they would upgrade to stronger rearends like 57' Oldsmobile rearend, ford 9in 83/4 and 93/4. Mostly big blocks motor plate applications.