1966 Barracuda grill headlight surround

I'm trying to remove the left side grill to get at the fender without harming it as some PO crunched it making my new larger tires rub just on the driver side. I need to massage the fender some but seems like these fasteners are near impossible to get at. Anyone got any ideas/experience on these? Seems like they would have to come out to remove the fender and vice/versa for the grill. Which comes first? By the way, this is not how to do body work, almost 1/2" of bondo in spots. Sheesh.