I'd guess either a tensioner going bad, lifter tick, or injector tick

 

Listened to it today and noticed it doesn't go with the idle of the car, just seems to make the tapping sound pretty randomly if that makes any sense.

 

Does it sound like this?
2002 monte carlo ss ticking sound - YouTube

 

I'm gonna go make a video real quick so you guys can hear, give me a few

 

Heres the video. Start listening at :44

 

It could be your coupler in supercharger.. ,Remove belt and check play..


Supercharger Coupler
Item #: 14-50-01076 - A worn coupler will cause a rattling noise at idle.We have over engineered our coupler to provide years of trouble free use on cars with smaller than stock pulleys.Higher strength than OEM.Better...
[more info...]

 

I couldn't really hear it very well until about 1:00 into the video myself. However, that supercharger doesn't sound very smooth and consistent, and it seemed to be loudest at the serpentine area and near the mouth of that supercharger. I wonder if that could be your culprit?


I will also take back whaT I said about valves. Wouldn't eliminate it as a possibility, but that didn't sound like a valve to me. Valves are more of a high pitch tinging sound that almost echoes a bit.... i guess a wind chime is the best way to describe that sound.

 

Thanks! Looks like a damn easy fix! I'm so glad that is the cause. It makes sense that it would too considering the motor has been replaced and that supercharger probably never got any love