Where would you rank Iowa State's win on an all-time CFB upset list?

[No coincidences]

I'm trying to think of a few that were bigger.

I'd go:

1) Stanford over USC (I think USC was favored by at least 40; it was Harbaugh's first season I believe)
2) Iowa State over Oklahoma State
3) App. State over Michigan
4) Michigan State over Ohio State ('98 I think when OSU was No. 1 and MSU was around .500)

Others?