Has a College Football game ever ended 70-45?
Exactly once. On October 24, 2009, Nevada beat Idaho 70-45, and no College Football game before or since has ended that way. When it happened it was a scorigami, the first 70-45 in league history.
That makes 70-45 the 1820th most common final score out of 2,216 that have ever occurred in College Football. One point away, 71-45 has happened never and 70-46 has happened 1 times.