Ticking noise, 383, can't locate the source

I'm looking at the other side, cause I didn't put the driver's side back together yet, and I'm not seeing a lack of space, or a chance for a lack, I mean it's not a big gap and not easy to see.

I'm looking at the passenger side apart, looking for evidence of 'no space' damage, or something obvious, nothing.

Not sure if that's possible to even see.

I can put it back together tomorrow when I have more time to check.

I can't stop staring at these rockers, pushrods, etc, wtf is ticking!

I did run it w/o the belt on before, and checked the water pump and alternator, nothing. It has an in tank pump, so no mechanical pump.