grille and tail interchange between 67 and 68 barracuda

I tried that swap on the grill, and found out that altho they look very similar, everything is just different enough that you more or less have to swap all or nothing. If you do that then yes, the 67 grill-works will fit into the 68 opening. So if you can get the parts for a good price, go for it.
I eventually went back to a 68 grill-works in the 68 opening.
At the back I installed the 69 taillights, and the FormulaS panel, with 69 back-ups.
So for a while, I confused a few people with my 67/68/69 lights., lol