[Mackie]

My 63 is "darty" since the PS upgrade. A front anti-sway bar helped some. I've had it explained to me that the stock geometry and alignment makes for easy manual steering by small caster angle. I bought tubular upper control arms which add caster and will ask the alignment shop to set it at about 6 deg.
The trick will be to find a shop that does alignment old school and not just by computer specs.