Ticking noise, 383, can't locate the source

Just ran it, still ticks.

The good news is now it's popping out the tailpipe on that side - nice!

Pulled the valve cover, spun engine, everything looks ok.

I was meticulous taking it apart, kept everything in order, spun engine manually first, watched all the valves open and close.

There's something serious wrong with me, I must be crazy.