Patrick, you won't believe it, but I just took the day off to attend to it. Popped the driver side valve cover. As I was pulling it off I heard the same tinny noise when the engine was running. When I removed the cover a piece of sheetmetal had detached under the valve cover. It looks like it is some kind of baffle that was spot welded to the inside of the cover. It was lying right by valves 6 & 7 which is where the niose was. I would think it is supposed to redirect
oil spray back onto the rockers. Don't know if I need to replace the cover or if I can get it tacked back on. I'll see if I can figure out how to upload some photos of the valve cover and the metal piece. While I'm in there, I'm still going to check the lash, but this explains why the driver side was noisy and not the other side. Also, valves 5 & 6 were noisier than 1,2,3 & 4, but not as bad as 6 & 7. The metal piece was concentrated over 6 & 7, but still impacted 5 & 8.
Bob