[Eljaro]

Remember a nice way to bleed the slave clutch cylinder: push in the rod inside the slave several times until all the air bubbles come out in the reservoir (someone watching for the bubbles while you push), push the cylinder back out with the clutch pedal.
I do not know how the NOS cylinder looks like , but if it has a rod that PUSHES then the rod should go in as far as it will go without topping out at the bottom of the slave cylider. That way you will have all the travel available for your clutch. If the clutch disengages too early, well shorten the rod and the fluid will fill up the space and you will have less travel.