New leafs too high, how much will they settle?

I just installed P4120864 and 63. Supposed to be for a 2800lb car. Now my car is jacked up in the rear. All fasteners were tightened with the axle up. It’s pretty bouncy right now. I’m going to take the load off the front suspension and raise the front. Dang it.

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Just out of curiosity did you use a torque wrench on the ubolts or just "Tighten" them?