Has an AFL game ever ended 78-67?
It has. 78-67 has been a AFL final 3 times in 16,622 games. The first was Carlton beat Melbourne on August 28, 1915; the latest was Richmond beat Adelaide on May 22, 1999.
That makes 78-67 the 1534th most common final score out of 6,607 that have ever occurred in AFL. One point away, 79-67 has happened 3 times and 78-68 has happened 5 times. At one point the score disappeared for 71 years, between 1928 and 1999.