The rears will fit fore sure with a 255/40/17 regardless of the suspension. The front is a little different. I have s13 coilvoers and my limiting factor is how close the wheel/tire comes to hitting the spring perches due to width of the tire. On a spring/strut suspension, you will run into hitting the spring perch due to diameter of the tire (I think you can only go up to a 25" tire based off the center of the hub).
The only 235 I know of that is readily available is a 235/45/17 which will have a 25.3" diameter.
This is a 255/40/17 on a 17x10 -20 wheel:
This is a 235/45/17 on a 17x9 -28
Those pictures are with s13 coilovers. Unfortunately there is no real drop in wheel for the fronts. This is why I am eventually getting custom sized CCW's.
Do you have stock springs and struts or coil overs?