No, but the one that comes with the Ford quadrant kit is. Cost is about $40-$41 from Summit or Jegs. Look for M-7553-C302 Service Cable, 1982-95 Mustangs
Ford Adjustable cable from above- notice the end in the upper part of the picture. That is the threaded adjuster shaft.
If you want the whole kit, it is P/N M-7553-B302, Cable and Quadrant kit 1982-95 Mustangs