I am unsure whether this ruling is national or queensland specific but the rear overhang (defined as distance from centre of rear axle to rear most aspect) must be no more than 3.7 m or no more than 60% of wheelbase, whichever is less.
A 130 has a wheel base of 127", 60% of this is in metric 1935mm.
The rear wheels on a 130 are close to the rear of the cab, but from the centre of the rear axle, back 1.9m would put the overall tray length at somewhere near 2.2m. I havent measured this but can if you need to!
My tray is 1.8 x 1.8 and I have no departure problems or overhang issues, I would envisage a 2.2m tray although handy may "look" a little long?  
I believe there is a member on AULRO with a singlecab camperback on a 130, it is just within legal limits and they are happy with it.  Irrespective of the above I would argue a 130 will take a longer tray "better" than a hilux as a 130 doesnt have a toyota badge on it 
Steve
				
			 
			
		 
			
				
			
			
				'95 130 dual cab fender (gone to a better universe)
'10 130 dual cab fender (getting to know it's neurons)
			
			
		 
	
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