Check anbd bleed your clutch, it should be hydraulic in '88 right? Other wise your clutch plate is beyond worn. Even a bad clutch should mildly engage. If not hydraulic, I would check your shift fork and all clutch linkages.
checking the slave, master, fluid level etc would be if his clutch
would not release
but it would be extreemly unlikely for the clutch hydraulics to cause the clutch to become stuck "open"
What is FAR more likely is:
a)the clutch disc "broke" either the friction material disintegrated'and fell off the "marcel" (the wave wafer spring)
OR
b)The Marcell spring broke and seperated mfrom the clutch hub
OR
c)The input shaft of the transmission simply snapped off.
I've had BOTH a & b happen to me personally and I've seen "c" on atleast three occasions.
There's another possibility with similar symptoms...
I've had my transmission output shaft SNAP OFF between the trans and T-case, this results in no movement in any gear...
AD