well corvettes are still running the inline restrictor he just needs to drill that **** out. the 370z main flaw in the csc is in a spot you have not taken apart yet
The piston seal which is the one you have pulled out is not the main culprit of the csc bitchness, and actually spinning the throwout bearing all the time is much easier on it than not, it is the acceleration load when it spins up to clutch speed that normally kills a throwout bearing, they go from 0 to w/e rpm the engine is turning almost instantly causing slipping AKA sliding friction as well as extremely high loads on the cage.