Converted, if you go to the wreckers and buy Bluebird rear discs, disc backing plates, and callipers they will bolt onto a 1200 ute (H165) diff. The other thing you will need are the bolts that hold the backing plates to the housing, the bluebird ones are longer.

Be careful when removing the backing plates from the Bluebird axles. DO NOT under any circumstances press against the Bluebird backing plate, they are alloy and you will destroy them.

The only other drama you might have is the hand brake levers clearing the rear springs. Keep in mind that the Bluebirds had their hand brake inside the rear disc.

Use a 200B master cylinder and 200B/Stanza front callipers. I didn't remove the pressure retaining valve from the rear on the one I did, but this was an application thing, I wanted to make sure there was no rear brake knock off, but that's a different story.

Have fun