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to keep getting theses issues I'd say that you need to check the condition of the flywheel and the amount of preload / assembled height of the clutch
as I'd say its possible the clutch is either being overstroked - which can be fixed by limiting the pedal travel or the flywheel face is warped so it would need fitting to a lathe and removing a minimum of material to clean it up
OK if clutch springs are falling out then the clutch is being overworked with sudden back and forth load coming in so it over compresses the springs and they lose their spring force and and then fall out or they are broken
for this to happen I'd say either the engine is vastly more powerful than before ( you mention modification?) and do you have a measured torque from a rollilng road ?
can you tell me what clutch you're fitting and what engine modifications you've done and what you're revving it to?
in a way its good to find some evidence as this means we're closer to fixing it
for a clutch to be in a state of constant slip then either the pressure plate isn't clamping it correctly, so check its fitted the right way round and that the centre part of the clutch isn't being clamped up / touching the flywheel or pressure plate which would prevent the outer friction face from being fully compressed
if this is OK then its likley that the slave cylinder or throw out bearing is too tall and / or not fully compressing so preloading the clutch too much
if when you come to fit the gearbox it feels like you're having to wind the bolts in to draw the box to the engine then this is a sign that this is happening
so the next steps are to make some careful measurements and compare the original parts against the new
do you still need help?
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