LA 360 - 0.030" Undersize Main Bearing Clearance Questions

Newbomb Turk said

Nothing wrong with a .030 under bearing as long as the clearance is correct.

You’d throw **** away real engine builders would use.

You do realize some guys turn Chrysler rod throws down from a hefty and stupid 2.75 journal (unless you are burning fuel) to 2.200 don’t you?

That’s a .550 UNDERSIZE.

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I've heard of it, but why do it? If cross drilling a crankshaft makes it weak, I wonder what turning it down that far does for it. I personally don't know of anyone who has or had a crankshaft turned more than 0.010". And a block that's been bored 0.060" can't be bored again without being sleeved. I think that I heard that they turn down the journals that far so they can use chevy rods.