Has an Olympic Basketball (Men) game ever ended 73-63?
Exactly once. On January 1, 1968, Mexico beat Bulgaria 73-63, and no Olympic Basketball (Men) game before or since has ended that way. When it happened it was a scorigami, the first 73-63 in league history.
That makes 73-63 the 126th most common final score out of 698 that have ever occurred in Olympic Basketball (Men). One point away, 74-63 has happened 1 times and 73-64 has happened 3 times.