I run the Keisler hyd. set ups in 2 vehicles , there's no need for anything but the pedal itself, depending on the style (FTE or Wilwood/Keisler) of master, you'll end up removing the welded stud that was used to connect the OEM clutch pedal/Z bar rod/clips, and after mounting the hyd master cylinder you'll need to properly locate the heim end of the hyd master pushrod to it's intended pivot point on the clutch pedal, drill, and either create a thru hole / or drill-tap depending on the heim end stud

Mike