Roller camshafts?

Made a check of the cam today, not sure though if this method is accurate
enough.
Did remove the rocker arm shaft and put a micrometer on the top of the pushrods. Aligned it to be parallel with the pushrod and cranked the engine by hand while watching the micrometer.

The cam is a MP purple shaft 284/484

The reading was (including the 1.5 ratio of the rockerarms) between
0.483" -0.486"..What are the tolerences from Mopar Performance ?
Should I bring the cam out of the engine?
The reason I´m checking the cam is that I had a noice from the passenger side
of the engine after sitting in idle for about 10-15 minutes.
The cam was broken in a couple of months ago and hasn´t been running since then

Could the excenter on the camshaft for the fuel pump wear down ?

The main cause for the trouble shooting is, this sort of, tapping noise on the passenger side
and it doesn´t sound as a ticking lifter noise either, more like a knock.

This is video clip of the engine at idle. Did try to locate that whinning sound.
I believe it is comming from the alternator, had some funny reading on the alt. gauge.
http://www.youtube.com/watch?v=VruYnjtdeNk