I weld them on the Torsion bar crossmember and then jack them up against the pan where it starts to lift my car off the stands. Takes that sag out of the car. Funny the doors closed better. I test the door open/close as I do it. Why would you want to lock in non engineered sag?
If the doors aren't on, you get to align them anyways along with your fenders. It doesn't matter.
So... with the crummy tolerances to start with that these cars were built, it's a lot of overthinking.
Get the car level and go at it.
