I have three that I put higher than any others:
Hawaii: 5.5 points
LSU: 5.5 points
Va Tech: 5 points
I have several that I rate at 4.5 points like Boise, Auburn, Oregon, Clemson, Ohio St, Oklahoma, Florida, aTm.
I'm sure there are some that are significant that I just don't know about, especially if it's at elevation.
Boise
Hawaii
LSU
Oregon
Florida
Some other ones:
Nebraska (they've sucked for awhile, but they haven't lost a home night game in a long, long time. 17 straight wins, I think it is. Beat Sparty last year, Beat Braxton Miller, Beat Wisconsin the same year they scored 70 vs us in the conf title game, beat Michigan)
Utah
Washington
Ohio St
Wisconsin
VT
Wash or Wash St? I knew one was pretty tough