As I said earlier Jason said 2000kg on a HZ (not including early ones ie 1977) is a definite sandman identifier from the tags. I had this discussion with him on here and he confirmed the info came from Byron.

I'd love to know the reason behind sandman being upped to 2000, yet other panelvans with passenger tyres staying at 1950. I wonder if the extra 50kg was to account for the quad light front and spoiler? I have no idea on HZ GTS sedans, but did they have a change in weight at the same time to their normal sedan counterparts?