383 Formula S, 4-spd, TX9 fastback Barracuda

Any cuda guys that can help with identifying the correct decklid?
I've seen two types. One has a underside that's similar to a hood construction where you can see the outer skin through the windows of the underside frame. The other type the underside of the deck lid is completely covered. No openings through the frame to see the outer skin. Please, I understand they're interchangable but my question is which is correct for a Hamtrack February, 67 car