Has a FIBA World Cup game ever ended 91-73?
It has. 91-73 has been a FIBA World Cup final 3 times in 2,041 games. The first was Italy beat Argentina on May 12, 1963; the latest was Germany beat Jordan on September 2, 2010.
That makes 91-73 the 96th most common final score out of 1,178 that have ever occurred in FIBA World Cup. One point away, 92-73 has happened never and 91-74 has happened never. At one point the score disappeared for 31 years, between 1963 and 1994.