Afaik there are no geometry changes between US market and ROW cars. Euro height (true Euro height, not the lowered cars people like to claim is Euro) is actually the geometry the cars are designed around.
Kind of a moot point with your car either way, as from MY83 on, US and Euro height were the same.
This was the special US ride height from an archived C&D road test of a '79 SC:
And this is Euro/ROW height from C&D 1984:
You can visually trace the rocker panel trim line to the wheel center caps to see the difference.
We
all like to go lower, even if it makes the car worse, because it looks cool.