huggy, both is possible. In my case, especially the springs were too soft. The fact that your shocks are not adjustable doesn't necessarily mean that they are too soft from the ground up. Most shock absorbers that are not adjustable have a good average value. But of course they could be too old and worn out by now. Still I would start with the springs.
Here at TM there are certainly other members who have more detailed knowledge about the year of construction of your car and what you specifically need.
