Has an AFL game ever ended 66-53?
It has. 66-53 has been a AFL final 6 times in 16,622 games. The first was Essendon beat Collingwood on August 19, 1905; the latest was GWS beat Essendon on July 25, 2021.
That makes 66-53 the 342nd most common final score out of 6,607 that have ever occurred in AFL. One point away, 67-53 has happened 7 times and 66-54 has happened 5 times. At one point the score disappeared for 54 years, between 1940 and 1994.