Hi everybody,
after a month this topic is still the main problem for this 440 motor.
During this time I performed new tests,I tried old stock valvetrain with no results.Than I put back adjustable with more and less preload,nothing. Than I put lighter engine oil ( 10W-40) but the problem is still the same:
Only on passenger side, lifter / lifters under valve opened BLEED OFF overnight and take 3-5 minutes to pump up until the lash is gone and ticking go away.

yesterday I was in bad moon and took apart the heads because the very different valve spring installed height between cylinders make me nervous, moreover I want to check more measurements and even each cc combustion chamber because I'm sure I have something wrong on heads.

Thank you for support