Thanks for all the comments guys.
Well when i first got them back from the body shop it came with a lot of gaps so i took a heat gun to it to try to close them up. As for the SS grills i used the grills that came with the GPOs and used them as a template for my SS grills to be cut. I then cut the grills and mounted them and i just hand painted the mounting tabs so it wouldn't stick out like a soar thumb through the grills.