Installing 11" brakes

[Mark 47 willys]

I plan on replacing the 9" manual brakes with 11" manual brakes and a 2 chamber master cylinder.
Has anyone don this ?
What size master cylinder is used? 3/4" , 7/8", 1.0" bore for manual brakes? I read to use the smaller.
Do I need to install a residual pressure valve? I could not see one installed.
Any advice ????

 

[TLCJ5]

I thought about doing this swao when I had my "58CJ,but never seemed to be able to get the right mixture of time & money.(but that's another story). Anyway there's a pretty good write-up on this swap at earlycj5.com

 

[Mark 47 willys]

Thank you I have printed it out but it does not talk about the master cylinder size, I had read that for drum brakes you need the smaller size bore? I would think the larger bore would give more pressure for manual brakes. So just looking for more input! Mark