How much power can a 440 block handle?

my STOCK block 440/499 made 825h.p. NA and lasted over 10 yrs of heavy street use and many many track passes ! (ask Rumblefish)
I never did ,and maybe would have went a few more years but adding a stud girdle in the bottom seems to stiffen these up some so I have been told ......
440/505 motor now has this girdle in and is pushing some big #'s with a BIG BDS Blower on it so we will see......