Has an AFL game ever ended 104-45?
It has. 104-45 has been a AFL final 3 times in 16,622 games. The first was Carlton beat Essendon on August 12, 1944; the latest was Adelaide beat Footscray on July 7, 2017.
That makes 104-45 the 1534th most common final score out of 6,607 that have ever occurred in AFL. One point away, 105-45 has happened 2 times and 104-46 has happened 1 times. At one point the score disappeared for 50 years, between 1967 and 2017.