i re-read the post and what another buddy i just got off the phone with, says that he was told when talking about magnum cams with cam companies, you should use a 5.2 cam in a 5.9 as it will make more power and torque than the stock 5.9 cam.
I have read that before. The 5.2 Is actually bigger IIRC.
I found that fact out odd. But hey! (And) what the heck, if you can swap cams, then an easy gain it will be.