Not sure about the front shocks but in the King Springs catalogue they list a different front spring for the V6 VY&VZ.I assume that that's because the Alloytech engine is lighter?cos the V8 doesn't change between the models.Rears are the same.
The front struts on a VZ have a different mounting for the front sway bar link pins. You may have to swap the swaybar links from VY to VZ as well assuming everything else is the same?