Over the weekend I installed the MM clutch pedal height adjuster and Steeda QR quadrant. I adjusted the pedal as high as the kit will allow, just a little above the brake pedal. I did not use the spacer between the cable and FW adjuster because I didn't have an issue with it being out too far or hitting the firewall. I could barely get the car into gear no matter how I adjusted it.
I've been told I need the spacer but when you think about it why would I? That would only help to get more adjustment if the FW adjuster was the whole way out and hitting the valve cover right? (FW adjuster is only out about half way) It doesn't change the ramp ratio and make the clutch disengage more. The only thing that makes that change is the quadrant, which is why the OP recommends a Steeda QR. I also had a Steeda double hook to try and it was even worse like I figured.
I ended up taking the MM pedal kit out and running the Steeda QR and the car shifts great now. The pedal felt perfect in the highest position though and I hope to find a way to get it to work.
My car is a late 03 with 22,000 miles on the stock clutch.
In order to get this to work you NEED the spacer and the Steeda QR quadrant. When you reduce the pedal travel by lowering the pedal, that does not change the amount of thow needed to operate the clutch fork. To make up for it you need more preload on the cable itself. The safe way to do this is with the spacer, or an adjustable clutch cable. There is NO OTHER WAY to do it. Many people end up taking off the pedal height adjuster because they don't understand the relationship between pedal travel and clutch fork travel, and what you are trying to make up for by adding the spacer.