Need advice: Dual Master Cylinder 64 C10

[phraza]

Hey guys,
Done a heap of searching but can't pinpoint what I need.

I have a 64 C10 with drums all round and a single master cylinder.

I'm upgrading to discs in the front and I'm on the lookout for a dual master cylinder. I want to keep it manual non-power.

What do I need? Any master from a 67-72 C10? Plus a proportioning valve too?

Was looking on Rockauto and there are few different masters to get, none specify exactly if they manual disc/drum or not:

71 dual: https://www.rockauto.com/en/moreinfo...29934&jsn=1475
70 dual: https://www.rockauto.com/en/moreinfo...29833&jsn=1588

And then get a prop valve separately from somewhere else.

Or get a kit like one of these:
https://www.summitracing.com/parts/clp-mcpvs-2
https://www.summitracing.com/parts/rsd-g0571

Note: I'm in New Zealand so there aren't many parts stores around here that sell what I need, rockauto is really cheap shipping here too.

Thanks in advance!