FOR PARTS/NOT WORKING 

Clutch booster leaks through diaphragm. Cannot be repaired, but would work as a spacer if used without vacuum.

Master cylinder with the bracket attached still holds pressure, just rusty. Master cylinder without bracket leaks and needs to be rebuilt.  

2x 30610 05U01 - cylinder assembly, clutch master - BNR32 Nissan Skyline GT-R

1x 30605 05U00 - clutch master cylinder booster