Has an AFL game ever ended 158-91?
Exactly once. On September 8, 1973, St Kilda beat Essendon 158-91, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 158-91 in league history.
That makes 158-91 the 3883rd most common final score out of 6,649 that have ever occurred in AFL. One point away, 159-91 has happened never and 158-92 has happened never.