What dual master cylinder needed.....?

[Hansome]

Hi Folks,

I want to upgrade my single master cylinder to dual master - 66' C10 step side - drums all round .
Having looked around I'm finding myself confused about which to get and from whom!,
I'm not interested in having power brakes, and I will be sticking with drums for now.
Trouble is I can't just pop down the auto parts store as we don't have them here (for our trucks) in the UK and the good lady indoors won't allow me to come to USA just to go parts shopping ........... Yet!
As I said I've been looking online at summit - classic - brothers but I seems the more I look the more options I find and then the more confused I get about which is the right one for my application?
Any and all help will be greatly appreciated over here, thanking you

T' da

D
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