Has an AFL game ever ended 76-37?
Exactly once. On May 22, 1909, Sydney beat Fitzroy 76-37, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 76-37 in league history.
That makes 76-37 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 77-37 has happened 1 times and 76-38 has happened never.