Leaf spring shackle angle

Where did the springs come from? You can order springs with extra arch, did you?

As stated earlier, springs will settle with time and use. I wouldn't jump to any conclusions until you drive the car some and see what happens. Even the difference from side to side may work out. Once the car is completely assembled and driven a few hundred miles, jack it up, loosen the shackle nuts, set it down and jounce the rear suspension and then tighten the nuts back up with ALL the weight on it. Those look like 6 leaf ESPO Springs - I see 6 leaves on both sides, front and back with no half leaves, right?

And you heard right it's a lot easier to just take the front brackets off with the springs