So I got my swap running (!) as documented in my other build thread, however I am having trouble with the clutch system. Basically the clutch isn't disengaging the engine like it should.
I am using this clutch kit, K005901.

I rebuilt Rodney's slave cylinder with a new piston and seal and have that installed as well. The clutch pedal was replaced with a steel Fiero store unit, and the master cylinder is a couple years old. (The master cylinder worked fine before I swapped engines, so I assume it's still good).
I tried bleeding it a million times. I am getting decent throw on the slave cyl.
My questions: Are the Isuzu and Getrag clutch kits the same? Are the master cylinders the same? Any suggestions? Thanks all!