Name this tick!

[AdamIsAdam]

Who can help me name this tick? This morning after driving for a while I started to notice what almost sounded like a header gasket leak or maybe a rocker tick. I recorded it to share. I'd love to hear your thoughts.

It was pretty warm today, but not crazy hot. I was driving it spirited but nothing crazy. I went home and pulled the valve covers and checked for obvious signs of the rockers being out of adjustment, but everything looked ok. I was going to reset the lash adjustment but the few poly locks I tried were so tight I couldn't loosen them, so I left them alone. I could just barely spin each pushrod but nothing seemed overly loose.

The sound is more prevalent on the drivers side valve cover area.

Here's some details:

Car is new to me this winter. Engine has 1,800 miles on it. It's a 347 stroker with TEA Twisted Wedge 185 CNC heads with FordStrokers PAC HYD roller spring package (per the receipt).

Oil pressure is good (60 psi and 2,000) and oil is fresh this season 10x-30. The car runs fine.

I recorded the sound only but needed to make a video just to get it up to YouTube so you can ignore the slideshow lol, close your eyes and listen.

NOTE: There are two audio clips. The second clip starts at 25 secs and I raise the RPM a bit which makes the sound go away, so not likely a header gasket leak.

https://youtu.be/Z6NQ1R5wBJo