Rebuilt magnum 360 Noise

Who says it's "supposed to be able to handle it"? Hughes? Of course they do. That's like buying from a crack dealer and asking how good his product is.
Yea I'm just confused as to how the noise seems to dissappear with more rpms. I mean if my engine will run fine forever with this noise, I can live with it no issues. I just don't want there to be something wrong. It also just blows my mind my old 318 had a noise under identical conditions. Here is a video of my old engines noise. Same conditions. Steady rpm under 2k.

https://youtube.com/shorts/TEndLnTh240?feature=share