I also got a Shelby GT grill
Did you get the one that you just swap out do you have to cutup your original one?
Mine was a swap in. 2 difficult parts. 1. The plastic tabs are very rigid and require a lot of force to unsnap. there are several on the bottom of the grill a couple around the headlights.
The other difficult part was aligning the mustang emblem. The way the bars of the grill are arranged there ended being a slight slant to the pony.
Hope this helps.