The hole behind the headlights is big enough to sink them into, you just have to modify the brackets. On most of the ones I've seen the lights sit flush with the grille or even in a little bit.
I always hate the way the round headlight grille looks on those two years. The stacked headlight or older round front looks a lot better.
And yeah the round headlight brackets are welded on while the stacked ones are bolted.