Has a FIBA World Cup game ever ended 82-43?
Exactly once. On November 27, 2021, Argentina beat Paraguay 82-43, and no FIBA World Cup game before or since has ended that way. When it happened it was a scorigami, the first 82-43 in league history.
That makes 82-43 the 475th most common final score out of 1,178 that have ever occurred in FIBA World Cup. One point away, 83-43 has happened never and 82-44 has happened never.