Clutch disenganging issues

Hi E21 legion,
I'm in the (hopefully) final stages of a stroker swap, but I'm currently having issues with the clutch not disengaging.
Details on the clutch are:
-Resurfaced stock flywheel (about 2 mm off)
-OEM clutch disk, pressure plate and throw-out bearing from Walloth and Nesch (I didn't measure the throw out bearing dimensions, typical of me)

Things I've done to attempt and fix the issue:
-Bled clutch line: my brother and I did this about 6 times, every time with the slave cylinder removed and clutch fork compressed with a C clamp
-Adjusted clutch travel: I adjusted the mount between the master cylinder and the clutch pedal as far out as it would go
-Clamped off clutch line: the clutch pedal was rock hard when I did this

Any ideas? I'm hoping it's a bad slave cylinder, it's just strange that I had no issues before the swap (pulled the m20b23 and gearbox out, swapped gearbox to stroker and put back in) and now I do. I'm paranoid that the decreased flywheel thickness is affecting the clutch disengaging.
Thanks for reading
Cal

Clutch disenganging issues