Has a FIBA World Cup game ever ended 79-63?
Exactly once. On May 17, 1963, Uruguay beat Japan 79-63, and no FIBA World Cup game before or since has ended that way. When it happened it was a scorigami, the first 79-63 in league history.
That makes 79-63 the 240th most common final score out of 863 that have ever occurred in FIBA World Cup. One point away, 80-63 has happened 1 times and 79-64 has happened never.