I had 81 in a half once....quite a few times I had 70+ with my South Dakota team. Very weak conf. at the time, and I was running a full court press def / uptempo flex offense (I think), or maybe it was a motion.
Basically what was happening was what usually happens when the Full Court Press defense is working. That defense becomes, in effect, your offense. Turnovers by the other team turn into quick transition baskets.