66 Barracuda Disk Swap

if that set up is from a 66 cuda ,,they are the same upper A arms that you have,,use which ever have the better bushings,
also if your running rear drums,,get a dual master rebuilt works fine,,no poportioning valve needed if you use and adjustable one on the rear lines,,
i have disc up front drum rear on my 66 dual master,,adjustable valve on the rear,,,works great,,do your self a favor,,, install all new lines and hoses,