You want divisions? Here you go
Division A - USC, Neb, NW, MSU
Division B - UCLA, Iowa, ILL, Mich
Division C - Wash, Minn, Ind, Ohio ST, Rut
Division D - Ore, Wisc, Pur, PSU, MD
Fixed crossover groups
Group 1. USC, UCLA, Wash, Ore
Group 2. Neb, Minn, Wisc, Iowa
Group 3: ILL, NW, Pur, Ind
Group 4. MSU, Mich, Ohio St
Group 5: MD, Rut, PSU
Division A & B teams - 3 games against Division, 3 games against fixed crossovers, 3 games against other teams rotated
Division C&D teams - 4 games against Division, 2 or 3 games against fixed crossover, 2 or 3 games against other teams rotated.