Oh and incase anyone is considering buying this lower valance section for their 240z from here:
https://zcardepot.com/products/rear-valance-apron-roll-pan-sheet-metal-240z-260z-280z
https://www.thezstore.com/page/TZS/PROD/30-7240
https://zcarsource.com/body-parts/rear-valance-tail-light-panel/rear-valances
I honestly don't recommend it, the gauge of steel used is way too thick and this panel is quite flexible (OEM) which allows you to more easily manipulate it and fit it.
I've had to wrestle with this panel all the way, yes it will be far stronger and solid once on and probably far less likely to suffer rust issues in future, but the expense of USD->$AUD and shipping involved means I'd ask someone like @Ledge or @Léon to hand form this in house, or find a good donor (I haven't found 1 yet). Instead...