I have the pleasure of seeing this car at many events throughout the year since it's in my neck of the woods.
First, the car looks awesome, the craftsmanship is phenomenal. I know wild modification was the intent. However, I personally thought the grill has a clean but dated look to it. I actually like the shapes behind the grill better than the grill itself. (which I know you probably spent a ton of time on). I've never been a fan of body colored panels behind grills anyway. I always preferred satin black. I also think if you are keeping the grill, recess it about 2 inches and maybe leave the forward facing edges polished while the rest is satin black. ( think that was mentioned before).
You weren't looking for this feedback but I also think a rectangular taillight (more stock) would fit the shape of the panel better. The Vette taillight mod is also a little dated, even if it's from a C5 Z06. Maybe do some recessed or flush rectangles and paint the tail panel satin black. (it may tie in the front/back)
In the end, do what YOU want. It's a kickass car no matter what you do!
