In a fb thread Forenz used an aftermarket clutch line to invert his slave. This is a big deal because in the OEM config, the bleed valve being on the bottom makes bleeding the clutch line a bastard.
Here’s a clutch line that will do it. From SpecE30 sponsor Condor, aka Carlos Mendez a FL based SpecE30 racer. Stainless Steel Braided Clutch Line - E30 – Condor Speed Shop