Without a shadow of a doubt for me......would look a thousand times better in the original F8
I have a 69 dart that is F8 and its really a pretty color when new and Shiny.
To me, F6 is for a 70 or 71 car that is made for the color. In am currently doing body work on my dad's 71 demon for J6 but that is a car that could have been ordered like that and just fits. High impact wasn't really a 60s thing. Imo