Help an idiot pick a cam - 5.9 Magnum

20-810-9 - Xtreme Energy™ Retro-Fit Hydraulic Roller Camshafts
Don't know if you are running a LA timing cover or Magnum.
Now that is a good all around cam fornthe "LA" engine BUT could be a problem with the new lift on a Magnum engine. At .570 lift with the Magnums 1.6 rocker instead of the LA 1.5 rocker which the cam lift is based on, there could be a valve to piston clearance problem unless you have deep valve reliefs in an aftermarket piston.