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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those super stock springs? if so thats why i advise against those damn things everytime a spring thread comes up. too many guys stuck in the 70's and 80's and they were one of few options.