compatible break rotors/calipers.. Porsche, Rabbit, Jetta??

[joetech]

So I'm finally doing the disc break conversion. I'm starting with OEM german spindles instead of the conversion kits out there...


The Question:
What other rotors and calipers are compatible with this spindle?

I know the Ghia and 66-71 Type 3 components will work, but what about:

Porsche 914 or Porsche 924?
early Scirocco, Rabbit, Golf, Jetta, Fox?


In my next steps for completing the parts for this setup, I'm curious about my options here.

And do I need to upgrade the master cylinder on my Super Beetle for the upgrade, or will my current one work?

Cheers!

Joe.