Not sure if you would want them, but someone sells a prefab cradle for C6 suspension front and rear. If I remember correctly it was a bit bulky, so may not be of interest. I think I saw them on racingjunk.com. And, someone may have posted photos here.
Superbuickguy just did c5 front suspension, but you probably have seen that thread. If not, check it out.
Last edited by rtj; 11-19-2020 at 11:33 PM..