New springs will settle down?

Running new HD 340 Espo springs factory height build. I have an empty bare car with just the rear suspension. Appears quite high rise now. How much will it sink down when the car is built? Essentially it is a factory build with battery in rear, so, imagine a factory Duster 360 car.

Also, how much will the springs settle in a year?

I mean if the car is lower by 2" by the completed weight and settles 1" from springs settling in, I'll be in sweet spot city.


Otherwise I am in 4x4 territory. Shown is a 275/60r15 (not the final tire).

Trying to determine if I need to get 1.5" drop blocks or have to friggin take it apart and find a spring de-arch place.
I'd rather not flip the front hangers since it will raise the front of the spring angle upwards which I have heard changes the spring behavior adversely and make my pinion angle worse.

Thanks for any feedback.