Has a College Football game ever ended 83-7?
Exactly once. On November 1, 1980, BYU beat UTEP 83-7, and no College Football game before or since has ended that way. When it happened it was a scorigami, the first 83-7 in league history.
That makes 83-7 the 1819th most common final score out of 2,215 that have ever occurred in College Football. One point away, 84-7 has happened never and 83-8 has happened never.