You can reuse the slave cylinder and release fork, those are the same. But you will need a external slave 4.0 AX15 bellhousing. Bolt patterns between the engines and transmissions are completely different. The 4cyl ones will not work.
'93 YJ 4.0L, AX-15, NP-231, SYE, CV, 8.8in rear, OME 2.5 lift, WJ knuckle/brake conversion, hydroboost. Warn M10000 winch. Hope to some day build a stroker for it.
'79 Cherokee Chief, 401 MPFI fuel injection, T-18/D-20 and hydroboost. Otherwise stock.
Future mods: NV4500, NP205, high pinion D60 front and smooth bottom D60 rear, e-lockers front & rear. SOA with 35X12.50's