Mike Gundy called the ND win the best in school history, to which I say: Not so fast my friend...there is the little matter of the program's only National Championship in 1945, spelled large in one of D. Boone endzones. They beat another vaunted Catholic school in that Sugar Bowl: Saint Mary's (CA).
And the basis for that NC:
In 2016, the American Football Coaches Association (AFCA), the organization responsible for the Coaches Poll, awarded Oklahoma A&M the 1945 national championship.[9] This was after the AFCA asked schools who felt they had a legitimate bid for the title to submit their reasons why so that their committee could hear the case and decide.[10] OSU was (and continues to be) the only school to apply for the honor for any of the 28 years considered,[11] and was awarded the AFCA trophy.