Trunk lid will physically fit, but the lower edge of metal will not be cut away where the PONTIAC lettering goes. '69 will also fit, but also does not have the allowance for the letters. If you glue or caulk the letters in place, they will work.
Or if (God forbid) you are planning on adding a rear 'Maro spoiler, then the lettering holes won't matter anyhow.
Also, generally the 'Maro lids will have two small holes for the 'Maro emblem on the right side. Those holes would need to be welded up.
'67 and '68 fgf trunk lids are punched different on the underside, but physiaclly interchange.
I used to be indecisive. Now I'm not sure. I feel like I am diagonally parked in a parallel universe. 1968 400 convertible (Scarlet) 1976 T/A - 455 LE (No Burt) 1976 T/A New baby, starting full restoration. 1968 350 - 4 speed 'vert - 400 clone (the Beast!) 1968 350 convertible - Wife's car now- 400 clone (Aleutian Blue) (Blue Angel) 2008 Durango - DD 2008 GXP - New one from NH is AWESOME! 2017 Durango Citadel - Modern is nice! HEMI is amazing! 1998 Silverado Z71 - Father-daughter project 1968 400 coupe - R/A clone (Blue Pearl) (sold) 1967 326 convertible - Sold 1980 T/A SE Bandit - Sold