Spring transplant from '03 wrx to '97 obs worked. Front struts went in with no modification. Rear springs were swapped onto old struts because '03 tophats are different. No more saggy back end. Thanks for all the input.
My rear suspension has gotten so soft, I get tire rub accelerating out of corners if I have any extra weight in the car. A friend has the OEM struts from his '03 WRX wagon and offered to let me install those. Does anyone think this might work?