They ride nicely with new springs and if you radius the ends of the leaves where they mate with other leaves just slightly and install lipped liners they ride even better (and more quietly). Radiusing the leaves is a very old trick and I'll tell you another in a moment. These are simple springs and any decent spring shop will be able to make them. Making them work at their best is up to you. When I was in high school we would save a quart or so of old crankcase oil, mix that with equal measure of kerosene, jack the car/truck up and apply that to the springs with a hand pump oil can. It wasn't a lot of fun (particularly in the winter), but your vehicle would ride like new for a few weeks. When it was time to do this again (next oil change) we'd go to the coin op car wash and hose the dirt/dust off the springs first.
Bret it dawned on me last night that one possible rescue for your old springs might be to use spring liners. If the inner parts of the springs are not too pitted, liners might get you by. Spring liners can be Teflon, HDPE, LDPE or other poly compounds. I like the lipped ones because they stay put. Here is an example of the width you need:
https://tinyurl.com/y4ur8oro Just a thought.
