FWIW, master clutch cylinder is a breeze to replace: bend down to disconnect the clutch pedal (round thingy keeps the pin through the pedal), then open hood, remove two bolts holding master cyl bolted to firewall (that's the thing where you'd put clutch oil in, that's your master cyl). Disconnect tubes, taking care not to leak fluid and to let as little air in as possible. Connect tubes to new cyl, bolt back in, add oil. Pumping the pedal will force the air bubbles to go out eventually.
As for slave cyl, it could be on the inside the bell or the outside. If I remember correctly, your's would be inside the bell, which means more job since you have to disconnect the tranny from the engine to gain acess inside to swap the slave cyl. To double-check its location, just follow the line from master cyl down to tranny. If it ends in an oval-shaped thingy outside the tranny, then it's on outside (I don't belive it is, though). If not, get ready to unbolt the tranny...
If you're changing BOTH your cyls, then get them as a pair with the tube and oil in, all aired-out. Saves a lot of trouble chasing them bubbles outta there.
On mine only the master was kaputt, so I changed only that one, and all was well again. Good luck.
Beauty is in the eye of the beer holder
* 1994 ZJ (by VIN) with a 1995 engine (PO knows why)