Has an AFL game ever ended 104-71?
Yes. AFL has seen a final score of 104-71 6 times. It first happened on June 19, 1937, when Geelong beat Melbourne, and most recently on September 14, 2018, when Melbourne beat Hawthorn.
That makes 104-71 the 342nd most common final score out of 6,607 that have ever occurred in AFL. One point away, 105-71 has happened 3 times and 104-72 has happened 7 times. At one point the score disappeared for 29 years, between 1989 and 2018.