I ran stock stamped steel rockers on a 440 six pack that had a 520 hydraulic crane but it would push a rod through a rocker ever so often. I would always carry spare rods and rockers to the track.... Gen 3 stuff is pretty hearty but the number you are asking for was not in this article...
One of the neato factors with Hemis has always been the rocker arm setup, and the Gen III is no different there. With a net-form casting, the rockers waste no material and their only downside is a lack of adjustability. Regarding stock Hemi rockers, Bischoff says: "They're kind of light, but they work very well. We've never seen a failure out of them with the street car stuff that we've done.