Has an AFL game ever ended 143-76?
Exactly once. On August 27, 1966, Richmond beat Fitzroy 143-76, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 143-76 in league history.
That makes 143-76 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 144-76 has happened 1 times and 143-77 has happened never.