It's amazing how disregarded southern football was back then. I doubt you can find slight as egregious in the history of national championship voting.
We have to give special credit to Fla. St. and Bobby Bowden. They were still independent at that time and came up with the "turf game" idea. They would play one of the media darlings (ND, Oklahoma, Nebraska, etc.) on national television, beat them, then cut a square of turf out to take back home to transplant in a "victory garden". Most of the blue blood teams refused to play southern teams as they were deemed unworthy. These turf games made a crack in the old football world and lead to more and more intersectional games being played and the leveling of the playing field for college football.
On a side note, Joe Paterno said he would never play a home game with Tennessee again after we ruined their undefeated season 2 years in a row. Shout out to Bobby Majors.