OldIHC

He says there is no homemade patching on it, factory stamped contours, no signs of welding pieces in,

I asked if he had access to the ID plate on door, but he said doors were already gone when he got the grill,

I asked about frame for chassis number and he said frame is gone too, not much to go on,

I would guess it is from some design prototype or show concept. The pictures I have seen of Australian trucks all have the same parking lights as over here for R series