How to remove a cab 13?

[Grant Bowker]

Please take my answers as Canadian, not 100% applicable to the Australian situation.
If you have access to the whole truck, not just the cab, don't let the remaining parts go to waste after you take the cab.
The fuel tanks look worth saving. Even if they are useless for fuel and beyond repair, the filler neck and other parts should be saved to permit recreation of new tanks.
In Canada, I would say the wheels were non-original but I believe in Australian service tippers used a similar looking wheel when fitted with dual rear wheels. The transfer case shows a PTO which is consistent with the tipper idea or might be for a winch, what can you learn from the rear of the frame.
From what I can see, the front axle appears typically CMP.
The bumper could probably be straightened in a press, the brush guard could be used as-is or straightened, the tow ring on the bumper often gets left off when people remove and reinstall the bumper.
In short, the list of potentially useful parts never ends so if you don't need or want the whole truck or don't have the means to move it, please let others know how to get hold of parts they might need. If you have the truck sitting, you will be amazed how useful it is as a reference or parts source. Once it has gone to the crusher, it is truly gone - forever.