Thanks, I took it for a test drive and about 1 minute into it, I heard some pretty hard hammering, though no loss of power. I was just going around the block so I pretty much coasted into the driveway and back on the ramps.

It appeared that two of the injector lines on the deliver valves were not tightened properly. This made me second guess everything, so off went the intake manifold and disconnected each fuel line from each DV, undid the clips that hold the DV's in place, and one by one, removed each delivery valve to confirm the spring was still where it was supposed to be. Everything appeared OK, but I wanted to be sure. I didn't mind too much as I also wanted to R&R the oil pressure sender, the original one was giving a rating of 3 bar at all times...even with the engine off. Now that reads as it should.

This time, I tightened the DV in three steps and centered it before tightening anything, torque, then back off, torque, then back off, then a final torque. Put everything back together and I don't see any leaks so far. I do still see some bubbles in one line, fairly consistently, how long before this "normally" goes away? All new plastic lines came with their own seals.

The breather ports for either cylinder 2 or 3 aren't seating properly due to brittle age, other than some extra blow-by in the engine compartment, would that give me that much extra noise? I'm hoping to have those parts in soon.

Here's another video I made after the above work:
https://youtu.be/Se1B_jFu-yk

I test drove it and there didn't appear to be any substantial nailing like before. Everything looks fairly dry.