Go it. Thanks Jerry.
So I take it that the rotation of the pushrods MAY be a source of concern but it's not the cause of the original problem.
I would think the engine needs to run, varying speeds, on the road (loading the engine), for an extended period of time (circulate the oil).
What I'm trying to say is that maybe the lifters lost their pre-load of oil if the valve adjustment was too tight.
Hopefully they will recover as the engine runs in the future. If they don't, there is information on Stovebolt on how to manually pre-load.
I would only do the pre-load NOW if a lifter sounds like it is going to self-destruct.
My 2 pennies.

"Adding CFM to a truck will only help at engine speeds you don't want to use."
"I found there was nothing to gain beyond 400 CFM."