Ended up ordering the M20 RHD flywheel.
It looks like the solution to the clutch conundrum comes from an S14, although ECS still can't seem to decide whether the disc is sprung or not...
[image: OKlAKkj.png]
Edit: I guess it should be noted here that, according to the internet, the M20 flywheel, clutch and throwout bearing stack is slightly shorter than the M42 setup, which is why the longer e21 323i throwout bearing is normally required. Aaaaand the ring gear is different, which requires an M20 starter. Once I have everything in-hand I intend to assemble it all on the bench to make sure everything lines up between the stock M42 stuff and my hodge-podge setup.