Clutch to the floor.

[bmorgil]

If the linkage is good, you could remove the floor around the transmission and remove the inspection cover from the bell housing. You can look right at the clutch and throw out bearing assembly.

Is the clutch engaged or disengaged? If it is disengaged (engine and drive train locked together) and the pedal just drops to the floor, it sounds like something broke in the fork throw out bearing assembly. If it is engaged or the engine is not locked to the drive train, It would leave me to believe the clutch cover/plate assembly is defective. You need to pull the transmission and transfer case to replace the clutch.

Clean up the end of the cross shaft at the retainer on the outside of the case and you should be able to measure the intermediate shaft. Unless the transfer case has been changed out or your CJ is a pre '46, it should have an 1 1/8" shaft in it.