Billboards all depend on the color of the car and the decal. To me, I love Curious Yellow with black billboards, but a black vinyl top and rubber bumpers should be a part of the image too. But seeing a car without a vinyl top and without billboards also makes for a new experience, as if it is a different car.

I also love white billboards. Of course it depends on the color of the car, but when you see one color with black ones and then a similar one with white one, again it's like looking at a whole different car.

I think all you need to do is look at Alan Gallant's old white and orange '71 340 car to see that these cars don't need billboards, and his car ended up better without them.