Has a FIBA World Cup game ever ended 73-49?
Exactly once. On January 31, 1959, Brazil beat Chile 73-49, and no FIBA World Cup game before or since has ended that way. When it happened it was a scorigami, the first 73-49 in league history.
That makes 73-49 the 240th most common final score out of 863 that have ever occurred in FIBA World Cup. One point away, 74-49 has happened never and 73-50 has happened never.