Shims Under Main and Rod bearings

I cant see why the rod would be out of round if you fit thin brass shims between the rod and bearing half Halifax?

Toolmanmike if the engine left the factory with oversize rods with bearings that fit, why would I need new then? Doesn't machine shop sometims oversize crank bore and rods?

The crank and rod journal are STD size and not turned SGBARRACUDA. But on the rod big end side material is removed from factory by .0020". Normal undersize bearing which you choose when either crank or rod journal are turned down wont work. I need material added on the other side against the big end side of rod to take up the gap.

I found a link hear when someone did what I talk about. Deckwar Tapered Shims - Rod Bearing Shim Installation Guide