340 is knocking

:pale:

The 340 I just installed recently is tapping on the passenger side much louder than I would like to hear. I still knock at operating temperature and with a stethoscope I can hear ticking throughout with valve cover on. I can't pinpoint it. I thought it was normal in the begining (denial I'm sure) but now it is a little louder. I don't want to wipe out my cam. The cam was broken in by the engine builder on a dyno. I'm worderding if it is something with the valvetrain or an exhaust leak since I just put on new headers. BTW the driver's side sounds good.

One note. I removed the passenger side header to replace the oil filter adapter plate gasket and the header gasket was torn a little. I reused it anyways. So, I am really hoping that this is the problem. With my luck it is the valvetrain.

Question:
What should I be checking and looking for when I pull the valve cover? What issues may be causing this and how to fix it? Was the initial setup for the hydralic lifters off. They are non-adjustible steel Comp Cam flat tappet rockers if that helps.

Dave