This may be hard to get me an answer unless we can measure decibels, but I have a 54 - 235 -- hydraulic lifter engine. I did adjust 2 lifters and I have no hood on the truck yet. I may give all a half turn and see how it sounds. Lifters may have a problem but the engine does seem to run ok.
If you say no noise, I have a long way to go.
I am going to the Pumpkin Run today and maybe I can listen to another. I have not had an inline 6 for a while.
