Firstly, thanks for posting up the great writeup. Is there any particular model of commodore to pull the caliper frame off?
 
Secondly, I'm hoping to potentially use this setup on a 411 wagon front end, which I'm hoping may be identical to the 1k suspension.
 
Thirdly, I was doing some googling on girlock calipers, and came across a thread on ozdat where they had a picture of girlock front stanza calipers, they do look identical to the corolla ones, so may be another option (potentially easier) if you are looking for cars to get the calipers off.
 

Hey Dundee1000,
Just wanted to thank you for this thread. I peformed this conversion and can highly recomend it. All the parts were readily available at my local yard. If your in Adelaide all the corolla bits are plentiful. I did struggle to get the R31 brackets ( every R31 rear end had the bones allready picked) and did have to go to a nissan specific wrecker for them. One morning pull bits off wrecks and all in only cost me $170. that is a bargain I reckon.
Only downside is that my 13" watanabes don't fit over. Just means I have to start looking for another set of wheels
 
Thanks again

Guys anyone done a disc rear conversion?

Fair enuff too, 
I've thought in my head, a very similar spec with the 31 brackets etc, but using the 'commodore' rear callipers, smaller piston, might be a good combo.... I think I have read people have got the 31 brackets to work... if i get chance I will do some study 

Cheers for the info and good idea, have plenty of 510 parts lying around (and my brother has some finned alloy 260z stuff stashed somewhere).
 
I'm looking at the viability of suzuki swift stuff in place of R31 rear rotor at the moment, would just need to make the adaptor from R31 bracket to Swift caliper (or find a better caliper that suits that disc);
 
http://www.ebay.com.au/itm/Suzuki-Swift-Hatchback-1-5-MA15-2005-Front-Vented-Brake-Disc-Rotors-Pair-/291838571654?hash=item43f2ef3486:g:s1AAAMXQVT9TDO-D
 
Info from the ad for historical purposes;
 

Suzuki Swift MZ/ EZ GLX and Z Series models 1.5 litre front brake discs (2)  for Models 2005 to 2012.

[size= x-small]Technical Info[/size]

[size= x-small][/size]
Description: Brake disc

• Brake Disc Thickness (mm): 20
  
• Brake Disc Type: Vented Disc
  
• Centering Diameter (mm): 60.0
  
• Fitting Position: Front Axle
  
• Height (mm): 40.0
  
• Minimum Thickness (mm): 18
  
• Number of Bores: 4
  
• Number of Holes: 4
  
• Outer Diameter (mm): 251.7
  
• Pitch Circle: 100
  

[size= x-small]
[/size]
[size= x-small]Replaces [/size][size= x-small]SUZUKI [/size]55311-62J00 SUZUKI 5531162J00 SUZUKI 5531162J00000 SUZUKI 5531162J01

Got my front knuckle off my P410 sedan, ripped all the drum brake gear off it including backing plate etc.
 
Found that the R31 rear disc doesn't fit over the hub face without machining of the hub or disc
 
Considering just grinding the disc for the purposes of testing since it's an old one and unlikely to be used. Also bought a set of R31 caliper brackets which I'll test out tonight.

Taking the verniers home today to measure the differences between the rotor and hub, if I do go with the original brake conversion in this thread I would consider machining the hubs if there is enough meat, just so I don't have to machine rotors each time.

Just an update not that anyone cares about 410's he he
 
Got the stanza calipers delivered yesterday, they were cheap so thought I'd have a crack, all the corolla guys want $150 + for their girlock ones.
 
Roughly trimmed the R31 caliper bracket for mocking, needs some filing to the inner hole to fit over the spindle
 

 
Confirming the stanza caliper mounting bracket does not have the same hole spacing as the R31 caliper so they at least need changing.
 
I think I have a set of VT Calipers somewhere which I'm hoping to steal the brackets off for testing (hopefully the same as VL etc). Will report back.

I'm not really sure what the fuss is about, but the VN-VS commodore rear caliper works on a bluebird rear rotor, using the r31 backing plate. Need a twin pot master cylinder from a Datsun 120y, and on the rear use 1200 coupe cylinders that are still available.
 
I have commodore VN-VS rear calipers up for grabs. I am in Sydney too.

I'm pushing forward with the girlock calipers, just need to find a cheap set of vl calipers to get the brackets from, then I'll sort the rest out.
 
Is this the master cylinder I'm going to need?
 
http://www.ebay.com.au/itm/Bosch-Brake-Master-Cylinder-for-NISSAN-120Y-2D-Cpe-RWD-B210-75-78-12-1977-/201479592684?hash=item2ee91e9aec:g:VWgAAOSwGotWr3Bj
 
Did all 120y's come without a booster?