side doesn't matter, but i see what you mean as far as the part difference. they were used in other cars other than the 68' birds...maybe from two different cars??? maybe just a manufacturing difference...or just an original and a repro???
The GTO and LeMans rear lights are more curved than the 'birds. When set side by side, the additional curvature is obvious. They will fit the 'bird openings, but not seal well due to the tighter radius of the quarter sheet metal. I'm not sure about the part numbers though.
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