1985-86 - Final Four in basketball and NC in soccer, IIRC
1965-66 - Final Four in hoops plus ACC champs in football, also IIRC
1962-63 - Ditto
1941-42- Undefeated regular season and Rose Bowl in football (played in Durham after Pearl Harbor). Southern Conference champs in basketball with 22-2 record.
Seems like there was one year recently where Duke had an improbable run of ACC championships. Anyone?