Every part in the engine needs to be measured, measurements compared to specs, and then you decide what can stay as is, what needs to be reconditioned, or what needs to be replaced. If you have finger nails, any ridge at the top of the cylinders that you can catch a finger nail on is out of spec and it needs to be bored, any scratch on the crank that you can catch a fingernail on, the same thing it needs reconditioned or replaced.