Problem is, the throwout's free clearance CHANGES WITH TEMPERATURE. As with valve lash when you adjust cold, clearance decreases with all concentric throwouts when everything is warmed up, and that takes about 30 minutes of moderate driving on the road.
I built one out of a Tilton dirt track racing assembly back in the mid-'90s, and you need far more cold clearance than you'd think. The Tilton throwout carrier is internally fine-threaded and has a threaded ZF nose piece, so to adjust it, you disconnect the lines and rotate it, then re-bleed. It's held in place with a stripper allen-bolt, not just hanging on the lines. Once adjusted, it stays there. Haven't readjusted in 20 years. Tilton does not build one for a ZF.
The good news is, you only need to slide the ZF backwards for access while it lays on the lower subframe rails. One person can do this without an engine crane- no need to completely remove the 155 lb lump. You may need to unbolt the A/C condenser ass'y and swing it out of the way so as to slide the ZF back far enough. No need to disconnect the A/C. Good luck.