Has a FIBA World Cup game ever ended 78-76?
It has. 78-76 has been a FIBA World Cup final 3 times in 2,041 games. The first was China beat Spain on August 7, 1994; the latest was Italy beat Serbia on September 1, 2023.
That makes 78-76 the 96th most common final score out of 1,178 that have ever occurred in FIBA World Cup. One point away, 79-76 has happened 2 times and 78-77 has happened 3 times.