Thinking about larger bearing clearances and longevity.
If you were building an 800 HP pump gas motor that you wanted to last 100,000 miles, what are the main things to consider ?

Here's my thinking: An 800-HP street motor is not always at WOT putting out 800 HP, not like a dedicated race motor.
If the oil and oil pump were kept in good shape, you would think the ring seal would be next thing in the shortblock to go away.

The valvetrain parts are another matter entirely.

So there is nothing inherently short-lived about larger bearing clearances, say .003" on 2.750" main bearings, or .003" on the rods ?

I don't have an answer about making ring seal last longer, except maybe by using wider rings ? like the old 5/64" rings ?
I think the wider rings are a horsepower loser, but they would maintain seal longer ?