I’ve never done a back to back test.

The cores are available in the Chevy world.
Some customers want it, so I get it for them.
But it’s not like any of those motors that got the FO swap stood out as being anything extraordinary.
They worked as they were expected to...... even without considering the FO swap.

The most abused motors I’m involved with are supercharged marine stuff.
They don’t seem to experience an unusual amount of crank failures....... almost none that we see have a FO swap cam.