How would you go about doing this?

mbaird said

I've changed oil several times in a few hundred miles for fear that there may be something clogging the lifters.
Used a variety of viscosities. I would think that if it was a bearing or pin ticking it would be constant and not variable.
I can only really hear it at idle but assume that it is just being masked by exhaust and intake volume.

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This one makes the most noise at about 30 in third, and I can hear it bouncing off curbs, and sometimes isn't there at all no matter temp or RPM's.
I can also hear it through the firewall just barely, and you are right about not changing if it was a pin or something like that.
It would change with temperature and RPM's both if it was something else.
It's obviously right under the valve cover, and I fired it up a few minutes ago and it's not there at all. :D