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A Salisbury from a v8 vb - vk would work get the booster and master cyclinder as well for the rear disk conversion.
Does it have power steering if one is to get technical were there any v8 commodores that didn't have power steering as I all ways preferred power steer and never seen a v8 commodore with out it. I know of a bloke getting a road worthy with out power steer but the only one I know of the car is a pos that I reckon he bribed the roadworthy mob.
If you don't plan of powersteering add that bit of bs to your find out list.
Just found a 10 bolt salisbury 3.08 single spinner out of vc should do the trick nicely ayWhat diff are you going? If its got the factory diff it will be the small 8 bolt. Depending on what your plans are it may be worth looking a Borgwarners from a later commodore as half decent 10 bolt Salisburys are getting prices these days for ones that don't need rebuilding.