Has a FIBA World Cup game ever ended 67-49?
Exactly once. On November 26, 2017, Uruguay beat Paraguay 67-49, and no FIBA World Cup game before or since has ended that way. When it happened it was a scorigami, the first 67-49 in league history.
That makes 67-49 the 475th most common final score out of 1,178 that have ever occurred in FIBA World Cup. One point away, 68-49 has happened never and 67-50 has happened 2 times.