Barracuda parts interchange ability

The search for answers started with this: I have a 68 cuda with a 67 grille and I`ve found a guy who `s got a 67 with a 68 grille. We would like to just swap grille centers but is it necessary to swap the surrounds and bezels,etc.or just the actual grille.I`ve heard that there`s a bracket that needs to be swapped out as well. Has anyone had experience with the two that could definitively answer this? Thanks