Ticking noise, 383, can't locate the source

Exhaust leak, I'm almost certain.
No more popping today, still ticks.

Spoke to Mike at B3 for over an hour. He told me to take some fuel line, stick it in my ear, and use the other end to search the engine. It not only transmits sound extremely well, but air flow as well.

Initially it sounded like it was coming from the #5 spark plug. I pulled all on that side, checked them, switched it with the #1 plug, anti-seize, put them all back.

Tick loud and clear where the left arrow is, about the middle of the header down. I can hear it a little on either side.

If I butt the hose up against the head at the right arrow the tick is just as clear, strange.

I put it there by chance while I was checking around the base of the head for a blown head gasket.

No where else do I hear anything when putting the hose right on the engine, heads, headers, valve covers, etc.

I'm over analyzing again, but notable.

I need to move it around a few times, then I'll pull the header and find out for sure.

A few notes:
I'll post the results of pulling the header asap.

This weekend is supposed to be new clutch and rebuilt trans swap, but it's going to be around 100 degrees in the shade, so we'll see.

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