No service hydraulic lifter

That’s just how they are.

We had a 440 on the dyno last year.
Power was hanging on pretty good for the combo.
Tried sneaking the upper rpm limit from 5800 up to 6000.
Power was still not dropping off much at all.
Made a 2nd pull to 6k......... one plunger got stuck down at the bottom of the body...... and that was that.
Had to replace it.