I am wanting to convert my 97 expy's front end to a 99 and newer front end, from looking at the newer ones, all I can tell that is different is the grille and the front bumper...what all would be needed for it? I already have a few in my head, but I was wondering what else i would need, or if it is even possible:

-Front Grille
-Front Bumper
-new fog light assemblies

Would I need new headlights? Thanks in advance for any help!