My Sub (2007 1500 LT no auto-ride) has 114k miles. While working under it, the rear shocks appeared to be badly rusted, so given the mileage, I went ahead and ordered Bilsteins for both the front and rear. The rear shock replacement was straight-forward. However, when I go to the front, it doesn't look as simple. The shocks are inside the springs; are these struts? Can the shock be replaced without using a spring compressor? If so, can someone point me to a DYI for it?