Has an AFL game ever ended 120-86?
Exactly once. On July 14, 1951, Hawthorn beat Melbourne 120-86, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 120-86 in league history.
That makes 120-86 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 121-86 has happened never and 120-87 has happened 3 times.