Having replaced clutches on other compressors, but not on this one, my rule of thumb is to replace the whole compressor as a unit if it is fifteen years or older. My best story is for a friend whose we replaced because it seized due to driving through salt water for years on his Nissan. It lasted a month, maybe two, until the bearing seized and caused lots more trouble for him.
Don’t know the exact numbers for the spacing but I have used anywhere from .015mm to .045mm spacing depending on the application. Make sure to have feeler gauges. If the clutch won’t spin, add more shims until there is light to no drag.
Removing the compressor makes the job 10x easier.
But
@
sleepydad
offers sagacious advice, follow it.