IMO, I wouldn't go with the "copper" 5.0 it will start to look like a pimp mobile.
It could, admittedly. I'd have to see it on the car. I think it'd be okay seen in context with the other copper accents, but perhaps not.
I too prefer cubic inch designations for American V-8s. But the problem with "302" decals, in any color or any location, is that with the hood open it conflicts with the "5.0" on the engine cover. IMO that's points off for a car being shown. I have some pony tri-bar emblems for my car that have "5.0" at the top. They were available in a "302" version, and I really would have preferred those, but after a lot of thought I decided it would be wrong to have both designations on the same car.
2012 GT Premium Coupe | Performance White | 401A Charcoal+Grabber Blue | Comfort Pkg | MT82 | Boss 302 Shift Knob | 18" Pony Pkg Wheels w/Brembo Pkg Center Caps | Boss/CS Front Valance | Scott Drake 5.0/Tri-bar Fender Emblems | FRPP Strut Tower Brace | Redline Hood Struts | GT500 Rear Splash Guards | Rear Spoiler Delete | Sound Tube Delete