I just finished up 16" Burley Gorilas with Magnum Shielding cables that were 8 over. They fit, but if I did it again I'd use 9 over just to have a little extra wiggle room. What I suggest is get the bars, put them on, then measure for what you need. To me the easiest way is to disconnect the brake line fron the caliper. Mount the brake lever on the new bars and plumb it through the cable clamps then use a peice of stiff but flexible wire to model how much more brake line you need to add. All the other cables should need to be that much over stock.