Fresh engine, wiped cam? Tick? (new pics added)
Your getting a lot of grate advice and you probably should go back and re read some of it......If you don't get it figured out.
This is were you need to start.
#1 valve cover has to come off to isolate noise.
#2 if noise is valve train related........#3
#3 intake must removed to determine if lifter preload is to deep.....not deep enough, and if cam lobe, is damaged.....
Once you have determined failure.....then you can fix, and find out why(?) it happened. So it don't happen AGAIN!