[Damn too slow....again... 
]
The Australian valiant parts will work provided you have some australian valiant disk spindles.
they take the same size taper as your current upper ball joints.
If you have VC VE or VF v8 disk brakes they will be 5 stud on 4 inch PCD hubs so will match the back axle. think its PBR kit
If you have Later Mid-VG to VK stuff it will be a 4.5 inch PDC hub. it will all still fit but you would need the front wheels as well and their PCD will mis match with the back...
check if you have 2 bolt or 4 bolt master cylinder and buy a disk and drum one from the closest year you can get, to your car, for the US plymouth/dodge A body
you need a master cylinder of old enough vintage to have the machining for the rubber retainer for the pushrod. You can get late ones off 90s trucks, that don't. they will physically fit the car but with no pushrod retainer I wouldn't.
you could fit an australian booster and australian master but the pipe outlets are on the wrong side on the master cylinder. A VG VH one would be appropriate, looks a bit more vintage.
I use the proportioning valve off a VK valiant. if you go looking for one it is hidden up on the bulkhead on the inside of the car under the sound deadening near where the rear brake pipe comes through from the engine bay... Works very well with 9 inch drums out back.
same set up as charger R/T, they just hid it....
If i still lived in Oz and had a 60s US A body and the money and the time
I'd convert the front to VJ calipers (Girlocks), this is the claw slider set up, (not the kelsey pin sliders used VG VH). and id run VG 4 inch PCD front hubs and rotors
and i'd probably get all of my rotors and pads from Sunbury brakes....
the earlier Fixed caliper VC VE VF stuff is also pretty good i thinks that's PBR stuff too early for me i'm a VH valiant man... but of the right era for your car.
i would steer clear of the CL CM light weight alloy caliper stuff. although some seem to love em...
Holdens and fords used the girlocks as well, if you buy from holden and ford places the cost is about 1/3rd less than your friendly mopar supplier.
cross reference brake stuff on
Bendix.com.au use the part numbers you find, to find a holden place to buy your valiant stuff....
Australia kept the US 1960s A body disc spindle all the way through to the end.
small ball joint small inner hub bearing regardless of PCD
they took a design from the US company at the time they needed it ,and if it wasn't broken.. never changed it. hence the 1960s A body Automatic floor pan/tunnel in everything, the square rear trans mount with 2 studs and the persistence with offset bolt for flywheel and balancer/pulley bolt holes.
if they did break it, it was modified and became a unique Australian market part. at least until Mitsubishi turned up
Dave
