Has an Olympic Basketball (Men) game ever ended 104-76?
Exactly once. On July 18, 1976, Canada beat Japan 104-76, and no Olympic Basketball (Men) game before or since has ended that way. When it happened it was a scorigami, the first 104-76 in league history.
That makes 104-76 the 126th most common final score out of 698 that have ever occurred in Olympic Basketball (Men). One point away, 105-76 has happened never and 104-77 has happened never.