sounds like it might be a clutch fork or the rod and moved. but before you start taking the gear box out cheek every thing else, may be worth removing the slave cylinder and having a look.
As for doing the clutch you will need some long extension bars a deep 15mm socket (among others).
Iv done 3 now, 2 have been box out on the drive using an engine crane and a trolley jack (crossmember out) and the other on a ramp at work (crossmember in).
the second one on the drive was almost as quick as the one on the ramp. about 4 hrs ,first one was 8+