Has an Olympic Basketball (Men) game ever ended 83-63?
Exactly once. On July 31, 1992, Angola beat Spain 83-63, and no Olympic Basketball (Men) game before or since has ended that way. When it happened it was a scorigami, the first 83-63 in league history.
That makes 83-63 the 126th most common final score out of 698 that have ever occurred in Olympic Basketball (Men). One point away, 84-63 has happened 1 times and 83-64 has happened never.