K-I think in 96-97, the sport suspension was an option on the "R". Some people wanted the performance of the "R" but got the 16" rims and regular suspension. I think only in 95 on the T5R, was the suspension "hard" stock. So it would depend on if the original owner had that option. Also, I recall reading somewhere(here or another volvo site) that on the above cars, the shocks were the same, just the springs were different(or vice-versa) depending on the sport or non-sport set-up.
IMO, using used shocks is not economical, especially on a car(spring) that "old". Just get new bils or Konis or even Boge sport(shocks are less $$ than struts) and you will be much happier. good luck, BD