Of course it's possible- dozens, if not HUNDREDS of people have done this with this particular bike, and hundreds if not THOUSANDS have done it with similar frames.
If it doesn't work with the stock DC 960 brakes, use other brakes.
The DC 960 just has a hole- there's no "up-down" traverse for the arm holder. Later brakes such as the Shimano MT-62 and M732 and the Suntour XC Pro brakes have slots, so the arm holder can come from a higher or lower arc.
MC70M732MT62 by
Dave The Golden Boy, on Flickr