mine is drilled!
but my J's Type bumper has spots where you can drill it onto

 

I decided to permanently attach them using liquid nails.
i think it's an epoxy of some sort.
i dont want to drill for now. I want to have a cleanest look possible.
right now it is drying. we'll see how it goes.
the diamond cut grille looks really good.
i'll try to upload some pics later.