wilwood rear discs

Hello All, I just got my new strange ford 9" rear end with 31 spline axles. I put timken A20 bearings on both axles. I then mounted axles in the rear end to measure for some wilwood brakes. My options for brake kits had an axle offset of 2.32" 2.50". I measure my axle offset and they were...

Has anyone here used a Wilwood rear disc conversion with the internal parking brake, and if so can you use the factory cables or do you have to use their cable kit to get it to work?