No, the Atlas model isn't a '76. Notice that the '76 grille has separate "boxes" for the headlights, while the '73 and Atlas grilles have the horizontal bars going all the way to the headlights. It looks to me like Atlas modeled the top and bottom grille bars as one piece with the surrounding frame, which would account for the missing bars. But yes, the headlights are too small, as they should be the full height of the grill opening.
But I'll still buy them, when Chuck gets them. I doubt that most viewers today will notice the difference, if they have even seen a '73 Ford pickup.