One of the most important parts of installing a clutch master and slave setup, especially when using a hydrualic release bearing (concentric slave) type of setup is making sure your master adjustment rod / clevis has free play at the top of the pedal.
If your master rod is not allowed to return to it's "zero" position or "fully extended" position, it may allow pressure to build up inside the hydrualic system, which can lead to a heavy pedal feel. It can also do more damaging things, like burn up your clutch and your release bearing because it almost would be like driving around with your foot constantly pushing on the clutch pedal.
Here is some pointers to make sure your master is setup properly.
RHD CLUTCH PEDAL ASSEMBLY
www.grannasracing.com/products/right-hand-drive-toyota-supra-mkiv-clutch-pedal
SUPRA CLUTCH MASTER SETUP
www.grannasracing.com/products/tilton-master-cylinder-adapter-kit-for-mkiv-supra
I also offer master kits for the FD3S, FC3S, Soarer, IS300, Altezza, GS300, Aristo, MX83 Cressida, Chaser JZX100 JZX90, 350Z/370Z, R32-R33-R34 Skyline and GT-R, almost any popular import car, i make clutch master kits for them!!
www.grannasracing.com