I've driven many 1970s Chryslers over the years. Some with power, some with manual steering. I always liked the feel of my tires on the road with the manual steering. How often do you parallel park?
True but I don't spend that much time on the open road. My manual box works fine but a little assist in town would be a plus. Too bad Mopar power boxes were so loose. The early 60's power boxes were worse than the 70's boxes.
Caster will give you more road feel. I don't know how much caster can be adjusted into the front ends. I seem to need less with my manual box and you need more with your power box. Mike