I saw one like this the other day. Kind of interesting.
It doesn't bolt over the stock unit. You remove the stock grille shell (6 to 8 nuts on the backside of the grille) and replace it with this one.
So when ya get it, it will come sorta like this:
You unbolt your stock grille shell:
Truck will look like this:
Bolt in new one. Yer done.