67-68 barracuda grilles?

thanks guys.

So I can't just buy the center grille portion to change my 67 grille to a 68? I have to also replace the housing that the center grille mounts to?

That is correct. Turn signal assemblies off 1968 will not match up to you 1967 mounts either.
If you have good outer shells you can drill all the rivets out and put ALL 1968 parts on your 1967 outer shells.