1971-72 was a world away. Money rules now, and unless a school has unlimited resources (i.e. the football "Power 5") or focus their energies on basketball (i.e. the Big East, Gonzaga, etc.) its VERY difficult to compete and almost impossible to schedule those teams into a home/home.
Impossible? No, but difficult. And very, very few sustain their successes at our level (see Western KY, Middle Tennessee, Davidson, George Mason, for instance)