Has an AFL game ever ended 166-63?
Exactly once. On April 8, 1985, Essendon beat Fitzroy 166-63, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 166-63 in league history.
That makes 166-63 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 167-63 has happened never and 166-64 has happened never.