We added these to my friends 62 Impala SS 409 convertible restoration. The factory passenger side isingle control arm had been pulled off the frame racing a 327 3 speed convertible. I like these better.
They came from Show Cars Inc
https://show-cars.com/product/4183
https://show-cars.com/product/4180
We also added dual upper control arms -see the picture below of the factory rear end
They came from Show Cars Inc
https://show-cars.com/product/4183
https://show-cars.com/product/4180
We also added dual upper control arms -see the picture below of the factory rear end