Rancho 9-way single adjustable hocks have been used in rear drag racing applications. I had them on my Dart Sport for years but don't have the car here to confirm my particular #. Advertised applications include early Dodge pick-ups.
Link is to their master catalog.
* Usable part #'s at the bottom of
page 179
* Mounting end styles are shown on
page 164. Ours is
L type - L type
* Measurements of individual mounting ends is on
page 171. Ours is
L1.
https://www.gorancho.com/cdn/shop/files/RanchoCatalogFull2022.pdf?v=6930269045184371590