valvetrain noise 5.9 magnum

I just noticed the noise, and no I have never taken this engine past 5000 rpm before, And I run valvoline synpower 10w-30 engine oil. And I have no clue about the valve train lol so some pictures of what bolts to check would be nice. I have had the valve covers off once before to put new valve cover gaskets on and that's it. I noticed bolts holding the rocker arms on, if I remember right 2 bolts per rocker arm? Ca I just go around and make sure they are torqued to spec? Or do they have to be in a special position to check torque on them?