Has a College Football game ever ended 83-20?
Exactly once. On November 13, 2010, Wisconsin beat Indiana 83-20, and no College Football game before or since has ended that way. When it happened it was a scorigami, the first 83-20 in league history.
That makes 83-20 the 1820th most common final score out of 2,216 that have ever occurred in College Football. One point away, 84-20 has happened never and 83-21 has happened 1 times.