Has a Copa America game ever ended 8-2?
It has. 8-2 has been a Copa America final 2 times in 1,738 games. The first was Argentina beat Colombia on March 13, 1957; the latest was Argentina beat Colombia on March 13, 1957.
That makes 8-2 the 26th most common final score out of 36 that have ever occurred in Copa America. One point away, 9-2 has happened 2 times and 8-3 has happened never.