Disc brake wheel studs

Are you saying the rotors and hub assy in your kit are 1977 Cordoba? there is also the difference in the length of the Knurl the 67 coronet might bite into something you don't want to bite into?

Others here have mentioned that the silver studs seem to be inferior to the blackend color studs available. Look at rock auto and you will see the two color types mentioned. I can't vouch for the strength difference, I'm just reporting what others have said

Cant speak to the .004" larger being an issue or not.. Any machinists out there?
I see what you're saying. I might have to turn down a bit of that knurl. Idk how that will effect it. If I have to I still have the RH lugs from the original wheels. Not pretty but will work for a bit I guess. :(