yes and no.
Totally is as easy as that. if the spring hat doesn't interfere with the strut top/camber plate you are using.
BUT if you weld the seat low down and still use a soft spring, or if you really weld it low then you are going to run out of travel.
To combat this, chop and weld the strut to accept a new/shorter BODY insert and you're golden.
If you actually want height adjustment, then you're going to be playing is keeper springs or modifying a full tap coilover like Kpr or Volodkavidhshchhch (rob) have done.