Man I just installed the fiorre quadrant and firewall adjuster this weekend. Along with the ldc chicago clutch freeplay kit, all for less than 100 bucks! It was kind of a pain in the ass, but not to bad. The whole thing took me a couple of hours, taking my time and sippins some suds. Definately worth it, my car shifts much better now, hth.
Do it. It makes for much more consistent shifting.
You might look into getting a quick release quadrant and a pedal height adjuster. Makes it much easier to work the clutch, and makes all the pedals level.
I have the following installed on my car:
Steeda quick release quadrant (the red one)
LDC freeplay correction kit
MM clutch pedal height adjustment kit
MM firewall adjuster (get something other than this, UPR extreme or Fiore)
A good adjustable cable.
If you dont get the clutch pedal adjustment kit you wont need an adjustable cable.
The clutch pedal grabs right off the floor and I have the correct amount of freeplay.
I have a Mcleod adjustable cable and UPR extreme firewall adjuster coming to improve my setup.