When to worry about engine noises?

What’s false about that? What’s on the gauge and what’s at the bearings are far different numbers. And yes, I have measured pressure at the rocker shafts and seen near zero pressure.

So false it isn’t.
I'm not questioning that, I'm sure it's right. It makes sense. The ID of the rocker shaft is what? 5/8"? You'd need WAY more volume than an HV pump could flow to reach a measurable amount of pressure. But again, we're not talking about a rocker shaft assembly here since it's a Magnum based engine.