I thought I remember the 400, 4-speed, A/C combination was not available in '68 or '69? This memory is vague since it was a few years ago when I was looking for my car.
1967 FB 400 4-speed A/C Tyrol Blue w/ Dark Blue 1967 GTO 400 AT A/C Gulf Turquoise w/ Black (dad's 1st car, my last car)