Hate to tell ya this, but I have two '55 Fords, one a sedan, the other a wagon. Both cars have the stabilizer bar assembly's straight up and down.
So, makes me wonder if a previous owner drilled new bolt-holes in the bottom of the car frame for mounting the sway bar bushings.
When you had the sway-bar off, did you see TWO holes or FOUR holes with two not being used? If so, that could explain the offset you are seeing.
If that's not it, I wonder if a previous owner installed the wrong control arm bushings on the bottom A-frames causing a re-positioning of the whole A-frame. Or perhaps installed the front bushing on the back and vice versa (not sure that would make a difference), BUT if the bottom A-frames are slid to far forward or backward, that will mess up your ability to have a full and proper front end alignment.
I believe this is known as the camber adjustment, which is having the tires aimed to dig into the pavement whereby the weight of the car is directed ahead of the centerline of the spindle or aimed so that the weight of the car is directed behind the centerline of the spindle.
Either way, that would give you a slanted stabilizer assembly installation.