I think that should be right, the Monaro was based of the VT Commodore which was a 4 door 5 seat sedan. There is some changes to the body shell, doors are obviously longer on them and the seat backs have a leaver that allows them to flip forward but a lot of the other parts carry over. I am fairly certain that they would have used the same rear suspension arms and chassis mounting points. Later version of the commodore got a minor change to the rear suspension geometry to try and cure the camber and toe issues when the suspension squats, as it was causing rear tire wear issues. I don't think this would have changed the wheel bearing, hub or drive shaft though. This same geometry and design would have carried through from the VT generation right up to the next major body change which occurred with the VE generation chassis. I.e. rear hubs from VT, VX, VY, VU, VZ models should all be the same. The Monaro was somewhere in the middle of all of that. Wilwood offer a rear brake upgrade kit for the Monaro. the hand brake mechanism is also a drum brake that fits inside the rear disc and is largely concentric with the hub. It bolts on to a backing plate that mounts towards the front of the bearing face. Holden Special Vehicles models may have also come with a larger axle and CV joint but I am not 100% sure on this. What I can say is that with the heavy 4dr sedans being fitted with the LS engine and lots of local development in Australia, there has been plenty of people beating on and testing the durability of the hubs and axles.