Two things.

1. Micrometer handled by someone who knows how to use it (after reference-ing) is the ONLY way to go. Everything else is guesswork.

2. Unless mic readings and visual inspection were "like new" spec, once the engine is in bits grind the damn thing and fit new shells**, it just doesn't cost that much and it will last 250k miles if done properly.

** don't forget the rest of the lube system, oil galleries, sludge traps, oil pump itself, relief valve, etc etc.

The words "False economy" spring to mind.