Advice vs pros and cons of engine flush

I have always wondered about doing this for the small tick on startup till the lifters fully pump up.

Put a few thousandths longer push rods in to give the lifters a little more preload?

See what people think, have never done this but think it will work.

Kind of like how I went in on a custom buildt 440 with adjustable roller rockers on a hydraulic cam. Gave the pre-load on the lifters another 1/2 turn, and it eliminated the ticking on startup.

Comments Appreciated....

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