Stock Magnum rods/pistons durability ?

I love that Sledge hammer build. Look at the TQ/HP at 5500 RPMs. That's a lot of fun and probably plenty of mileage on the motor if you don't push it much beyond that RPM range.

My racing days are behind me, so I doubt that I'll ever see much over normal RPM's anyway. I just want be sure to have enough engine to be fun in my heavy E body.