Would be a lot of work to put the com brakes on a Salisbury diff.
The commodore rear disc rotor wont fit on to the holden axle, the axle would need to be machined both the "snout" where the wheel centres on axle is bigger on the holden, & also the radius of the axle, for the rotor to slip over.
Then the diff housing/ends of axle tube, would need modifying for the bracket that mounts the com backing plate and caliper.
That's before any clearance issues, but I think there's enough various commodore models to get some clearance. On different com models, the handbrake cable is mounted at top or bottom of the backing plate, so I think that would be worked out.
I would reccomend: 1/..
VB, VC, VH & early VK 5 litre Salisbury diff conversion. I have seen these in HQ-Zs, is narrower for wider tyres, & looks stock from diff plate point of view. I sold one to a guy put in a HR ute with a blown 6, & worked OK
2/...
VN onwards B/W diff. Common to find & stronger than Salisbury. Anything out of a ute is LSD + Calais is LSD.
3/...
9 inch
Late VK & VL (V8) B/W is a better diff, but getting hard to find.
End of essay, cheers
Max
SORRY, my train of thought wondered off from brakes to diffs... I will blame old age & alcohol!
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