Has an AFL game ever ended 78-39?
Yes. AFL has seen a final score of 78-39 3 times. It first happened on August 2, 1924, when Richmond beat St Kilda, and most recently on June 28, 1980, when Carlton beat Sydney.
That makes 78-39 the 1534th most common final score out of 6,607 that have ever occurred in AFL. One point away, 79-39 has happened 2 times and 78-40 has happened 3 times. At one point the score disappeared for 41 years, between 1924 and 1965.