8 1/4 rear end pros and cons

a suregrip 8 1/4" rear is a pretty good rear dont know the limits of them but mine has been behind a slightly warmed over 340 with alitle over 3000rpm stall and a firmshifting 904 for about 8years only streetdriving but most of the driving and plenty of good launches on the street on sticky tires and no complaints so far.