I don't know bleep about 58 c-cars.
With the aftermarket upper tubular control arms currently made for Mopar, I think most can be swapped left for right.
If this is possible on this car, try swapping them.
The OEM B body upper arms, '62-'72 , actually have the upper ball joint offset slightly forward to REDUCE caster angle!
And as others have said, return everything to stock, and start over.