The facts are that reving the engine without load, to high rpm,(redline) is far worse than under load. It's the main bearings and main caps that take the worst of this.
When drag cars do a burn out, they let the car go into second on an automatic, and not to obtain more wheel speed, but to put a little bit of load on the engine. Not so much reving it up but for any moment it's being held the engine is in a floating mode.
I guess it's true what I've heard for the past 40 years about redlining an engine in neatral.
The main caps will actually move (cap walk) on an engine when reved to excess in neatral.
3-4K in fine
Load on the engine also calms down out of balance engines to some degree.
Skip White