was the clutch pedal adjusted when the clutch was replaced?
its normal for the new clutch to feel and engage differently, just needs to be adjusted... take note as well that ALL 240sx clutches engage near the top. dont think you can make it fully engage in the middle :pface
To adjust your brand spankin new high performance elite clutch:
grab a 12mm (or 10mm... i forget) combination wrench, and pliers.
get on your back under the dash on the drivers side, look up at the top of the clutch pedal. there will be a rod coming from the master cylinder that attaches to the pedal. now losen the nut alittle that keeps the rod from spinning. take the pliers and turn the rod to adjust, theres a small groved section on the rod that helps the pliers grip easier.
just turn the rod so it moves out alittle bit, then tighten the nut and take it for a test drive. its all trial and error from here, Im sure you will get it right
there is also a second nut to adjust that is next to the clutch pedal and this determines how far teh pedal goes before stopping when depressed. this can be played with also.
have fun
