Sagging on one side?

1964 dodge dart gt hardtop 2 door

The drivers side of my car appears to sag lower than the right. I've never done any suspension work before, so I'm not sure what components would be best to start checking.

Front left makes quite a pronounced squeak when lifting the bumper up and down.

If I lift up the front left, it will squeak, but stay there.

Not sure if that's shocks, bushings, Springs, or what..... Thoughts?