I bought the UUC clutch stop when I first bought my car. The bolt on it was way too long. I had to cut off quite a bit too. Don't remember how much though. It's been so long that I don't remember if I had to adjust for the clutch engagement position or the start sensor position. It has a nut that you could adjust to keep the clutch stop from rotating and moving down from use. I used that to adjust it. I've gotten used to the short clutch movement. Don't really seem to notice it much anymore.
Johnny
2004 Imola Red over Black Leather. 6-MT, Navigation, Cold Weather Pkg (the wife loves them seat warmers!), 3.46 Diff, UUC Short-Shift Kit, Tranny Mounts, CDV Delete and iPod mount.