Max HP limit for 360 magnum stock bottom end?

I found the thread on the truck forums if you wanted to take a look. He ran 91 octane w/ intercooler and auxiliary fuel injectors. On a bone stock bottom end he says. Lots of miles on it, so I'm sure that helped with clearance and tolerances but didn't help with its lifetime stress. Turned it up to 17psi (corrected to sea level). Bent some rods, cracked some skirts, and busted some rings. I remember using a lot of this guys info and mistakes to tailor my turbo mag, I went with E85 to help cool things down, especially the piston tops. Either way, he made a stock 318 mag live for quite some time in a heavy (4500+ lb.) truck. I'd say 600 is the "limit" but that depends on how well it's built. Some may last longer, some shorter.

There is another guy who commented on there who made high 500's with a supercharger and stock bottom

318 single turbo made 560 wheel!!! - Dakota Durango Forum