Replacing the hydraulic actuation equipment should be part of the job. The hydraulic parts are subject to wear as well since they are hydraulic, a slave cylinder and master cylinder. The rubber components wear out too, so get off the jack and repair the whole system at the same time, it is really cheaper and definitely more efficient to take care of it now.
There are many aftermarket clutches for 300ZXs, some can get very expensive very fast. Racing clutches are highly recommended for modified turbos, for non turbo charged everyday cars buy a brand new OEM, original equipment clutch, which are available now from most automotive parts stores. The original equipment clutch manufacturers now offer the exact same clutches they sell to the factories, to the public via auto parts stores. Very affordable too.
You’ll need an alignment tool, a clutch kit of course that includes a throwout bearing. You would also be advised to have the flywheel surface machined at the machine shop, replace the rear main engine oil seal, and all of the clutch hydraulic components. The only non-common tool you’ll need is a pair of inside snap ring pliers for shift lever on non-turbo models.
Drain the transmission gear lube and refill it with the factory recommended synthetic gear lube. Synthetic is the keyword here. Make sure the transmission has no leaks, if it does have them fixed. Beats needing a replacement manual transmission.
Good luck, we present this info as a courtesy. We are a full service transmission supply company. Call GotTransmissions.com now for all of your transmission need. 866-320-1182.