Has a FIBA World Cup game ever ended 69-63?
Exactly once. On May 27, 1967, Argentina beat Japan 69-63, and no FIBA World Cup game before or since has ended that way. When it happened it was a scorigami, the first 69-63 in league history.
That makes 69-63 the 240th most common final score out of 863 that have ever occurred in FIBA World Cup. One point away, 70-63 has happened 1 times and 69-64 has happened 1 times.