My turn------
You guys are misreading the bearing clearance specs--it is no .005-.021 but .0005-.0021----------------
And if you do have .006 you are way out of tolerance!!!!!!

AAnd as far as toe stomping-------I guess I would be called an old or old time engine builder---we never scotchbrighted bearings back THEN---because scotchbrite hadn't been invented yet---however we did sand bearings with 400 wet or dry paper because we would then have a consistant pattern in the bearing surface so we could tell how much/where/how the bearing/crank journal oil supply was working---The surface of the bearing show never touch the crank as it should ride on the oil film and thats where oil wt., flow, clearance,pressure all come into play.

And for those back THEN who didn't like Valvoline because it foamed and others didn't---if your oil foams its the oil system causing it, not the oil and an oil that foams will have more surface tension than non filming oils so it will protect bearing/crank , along with other parts better.

These days with the non foaming syn lt weight oils the bearing clearances get more crital , especially with alum engines, however that old OLDSMOBILE could probably run on the old grease from the local drive in resturant