And THIS is why I have the mains align honed and the cylinders bored and the decks squared up. There's really three approaches:
Ignore (don't look or measure) things to keep it as cheap as possible
Measure a few things and do only what is necessary to maintain the serviceability of the component you're talking about
Update the accuracy of the component by utilizing the most modern machining (full machining)
I've done all three with success measured by meeting expectations of money and performance. The key to that being "meeting expectations". Anyone that thinks using either of the first two approaches they are not leaving power, economy, and life expectancy on the table even when using stock parts is delusional. But, in many cases, the expectation is not for maxing out any of those areas in order to meet a financial target. That's up to the guy writing the check.