I just rebuilt my 53 Manhattan-replaced springs all around, all suspension elements, shocks, sway bar insulators, etc, so should be back to original specs. New tires, and wheels correctly aligned. One complaint is a bit of steering wander. All steering elements are in spec, and I have concluded that the defect is vintage. As our drivers are a BMW and Audi of recent vintage, I expect it is the contrast that is causing the wandering feeling. I'm not sure that you could do much about this without completely replacing the suspension with a modern one, and of course such a kit is not available. Sway isn't a problem with mine-you might replace the insulators if there is looseness there.
When replacing front springs, be aware that the driver's side spring is speced a bit stiffer than the other, to compensate for the added weight of the battery, starter, generator, steering box, etc. Not sure new replacements always take that into account