yes. Till it is down.

What I found was it seemed like the new ones were too short. Turns out you have to compress them to make them "long enough" to bolt up.

So what I did was bolt up the rear shackels first to the car.
The the fronts to the springs. I had to get a second jack to push up the spring. With my foot, I would jack up the jack, and use my hands to stab the front hanger into the body of the car. Then I could get a thread or two on the stud and pull it through so I could get nuts on the rest of the hanger.

For me, the bolt that holds the front hanger to the spring only fit one way. It was too long to nut it on the frame side. So you have to put it on first.