I know this is a name we haven't seen in a long time, but wasn't XV doing something with Aluminum Control Arms & Spindles? I thought I remember seeing something years ago. I don't know where they went, but they did have a 68 Charger I really liked.
Your right, I think they did use Corvette uprights with their suspension. The guy(s?) working that stuff now look to be using Corvette uprights, anyways.