Has an AFL game ever ended 73-29?
Exactly once. On August 26, 1905, Essendon beat Geelong 73-29, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 73-29 in league history.
That makes 73-29 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 74-29 has happened never and 73-30 has happened never.