Well, unfortunately a few weeks ago after only approximately 3,000 miles on the new engine it has developed a intermittent lifter tick.
At the moment I believe I have a prematurely failing hydraulic lifter.
For those that want to follow the discussion you can read the more detailed thread I started hear:
https://67-72chevytrucks.com/vboard/...d.php?t=857659
One way or another we'll get this sorted out I really enjoyed daily driving this truck and am already missing driving it!