SS Springs

I usually set my shackles close to 45 degrees to the rear for the rear shackles to travel. If you race with super stock springs ; the rear end of the car wants to rise. the shackles take up the travel in the suspension[as car rises,the rear shackles come forward as the spring bends with the rise] If you start with less arc in your springs,you have more suspension travel and you won't need longer shocks or the shock extensions you see on a lot of cars. de-arc cost without taking springs apart was $20 [they use a hydraulic press]