Sound right? It sure sounds like it...

Time to re-do the top end...I guess...
EDIT:

https://photos.app.goo.gl/2hHCKLeLT19kN4W36

(video has sound)

 

What is linked there isn't a video.

 

whoops

try this

https://photos.app.goo.gl/2hHCKLeLT19kN4W36

 

Pull the valve cover, see what you find. Might have just spit out a rocker.

 

Only 2 things make that noise, a lifter issue, or an exhaust leak.

 

yepper

going to start tearing it down...

to get the lifters out, I have to take off the rockers? right? I remember being able to get to them without taking the heads off...but i think I had to take the rockers out...
its been 10 years since I did this

 

Yep, rockers and pushrods.