Has an AFL game ever ended 78-32?
Exactly once. On April 30, 1910, Sydney beat Richmond 78-32, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 78-32 in league history.
That makes 78-32 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 79-32 has happened 1 times and 78-33 has happened 3 times.