Has a FIBA World Cup game ever ended 82-58?
Exactly once. On November 27, 2017, Australia beat Japan 82-58, and no FIBA World Cup game before or since has ended that way. When it happened it was a scorigami, the first 82-58 in league history.
That makes 82-58 the 475th most common final score out of 1,178 that have ever occurred in FIBA World Cup. One point away, 83-58 has happened 3 times and 82-59 has happened 1 times.