I am guessing the record would be back in the 50s or 60s when the pace of play was faster and teams shot more. Guys like Rosenbluth and Cunningham averaged 20+ attempts per game.
Same for Duke. Groat averaged up to 23 attempts per game.
I would guess that Rosenbluth or Cunningham is the UNC leader and Groat or Heyman is the Duke leader.
That said, playing 1.5 games in one game will push Love up the leaderboard.