A FIREwall adjuster allows you to change the effective length of the clutch cable, changing the release/engagement point of the clutch disc. It mounts on the FIREwall where the clutch cable goes through it.
An aftermarket quadrant is just a beefier replacement to the nylon OEM one. With a heavier aftermarket clutch or some heavy footed shifting, these OEM quads have been known to break. While the OEM is self adjusting, many of the aftermarket ones have 2 or 3 hooks, allowing some adjustment.
They're a good investment, hands down. They are even known to fix the "clash" some experience with the Tremec 3650. When my warranty is up, a quadrant/adjuster kit is going to be one of my first mods.
I have the upr adjuster and quadrant and it works fine and is easy to adjust.
I would look at Fiore firewall adjuster becuase of its "click" locking mechanism.
and your stock ford cable is the best.
Steeda's new pedal stop adjusts the height of the clutch pedal for better driving comfort and optimum pedal travel.
The factory pedal placement puts the clutch about two inches above the brake pedal. Aftermarket quadrants lower the pedal down a little, but exactly how much varies based on the design of the quadrant, and can't be adjusted. Either way, the result is a compromise as some people prefer the pedal higher or lower. In addition, some racing clutches release very quickly and require the pedal travel to be shortened to prevent damage to the diaphragm.
Adjustable cable and quadrant kits have been used for years to adjust the tension of the clutch cable, but they don't adjust the height of the pedal when your foot is off the clutch. That height is fixed in place by the design of the quadrant. Steeda's new pedal stop adjusts the height of the pedal with the simple turn of bolt. Installation is simple and requires no drilling.
Note: This part requires the use of an aftermarket non-adjustable clutch quadrant and an adjustable cable or firewall cable adjuster