Home made spring shackles

Wnen I got the 4-door it had a pair of extended spring shackles. The car sagged in the rear because the shackles tilted towards the rear of the car. Not only did the rear sag, but the spring arc was more like a stretched S. The A-body rear springs are asymmetrical. I found that replacing the shackles with the correct length and installed high pressure gas shocks, restored the ride height and made the car ride much better, too.