My '70 Olds Delta 88 Holiday coupe was the same setup. I loved that car, but I stupidly :banghead3: traded it on another car. Big mistake, it was by my estimation, 95% original. I should've kept it.
If they are all the pictures of 74 225's have them. I think they are just the side marker lights, as I do not see any other marker lights up front. But I not sure of that.
Those are white cornering lamps just to the corner rear edge of the headlamps. The side markers are amber and just to the rear edge of the front parking/turn lights in the front bumper.
OK I see the difference now, the cars without the cornering lights have what looks to be a grill extension in the same shape as the cornering lights.