I'd actually do the same to the dash. Not to a Sandman or GTS but to a Belmont HQ van for sure! I wouldn't butcher a good body, but if it was part of a cowl and firewall repair, no brainer.

I actually have a Sandman 2 x chassis numbers higher than this one. PSN is a lot lower than this though, so maybe Acacia Ridge grouped body styles? Remember Brisbane cars got their BODY tag in the body plant before paint, so way before they entered the assembly plant. Chassis numbers went on right near the end of the assembly line so a better indicator of where they were on the line.