Super Stock Springs and Rear End Questions

RichardR said

Here's a couple pictures. Just tried the crowd bar and loosening and retorqing with full weight on and nothing. Same thing. Bolts are in shackles because the SS springs needed larger bushings. Could it be because I'm using the 7.25 rear end?

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The size rear end has nothing to do with this.
The angle of the shackles is correct in direction. But I do see there touching the bracket. How hard is it resting on the bracket?
You don’t need a spacer at the front of the spring. According to how I seen your first pucture, that was the thinking. It is now clear in the picture that it is NOT what I thought.

Double check the front spring hanger as to make sure it is actually flush against the mounting surface and fully secured flat against the body where it meets.

The only other thing I can think of is slightly worn out springs starting to sag.
Or bent body.