Well, I'll admit . I dont know the earlier cars like I do with 68-70
But on them the only way disc brakes were standard on manual trans cars ( hemi or not ) was if the 4.10 dana axle was selected ,,,,aka Super Track Pak pkg

A buddy of mine parted out a burnt 1966 Coronet 500 , Hemi 4 spd and the best I remember it had drum brakes . But the car had a 3.54 dana in it.