I put a Farrari slaver cylinder in. The Adjusting nut does nothing where ever I put it. My 1972 Pantera was working and will drive the car, But, When I give Full throttle it slip. Slips under power but will drive car Normally. ???

I put a  Farrari  slave cylinder in my  1972  Pantera.  The car drives Normally,  But when I step on it, the clutch  Slips.   Been doing that all summer.  Now,  When I put it in  Any Gear,  It wont  engage at all.  I dont see the  clutch turning, Just the Preassure plate.   P.S.   The  Nut on the  Slave  cylinder, does nothing, no matter where I put it.  It bottoms out against the cylinder..  is the rod on the cylinder too  short?.  Allowing the Clutch  just to touch the flywheel  enouygh to drive it.  But, not enough under power?  Wrong slave cylinder??.   HELP.  God Bless.  Lou.