Has a FIBA World Cup game ever ended 73-64?
It has. 73-64 has been a FIBA World Cup final 3 times in 2,041 games. The first was Soviet Union beat Brazil on January 17, 1959; the latest was Egypt beat Tunisia on December 1, 2018.
That makes 73-64 the 96th most common final score out of 1,178 that have ever occurred in FIBA World Cup. One point away, 74-64 has happened never and 73-65 has happened 4 times. At one point the score disappeared for 60 years, between 1959 and 2019.