Yipes, Stripes!
Finally got around to taking some pics of the satin silver stripes I added to the "R". These are about 6.25" wide, which seem to have the right visual proportion and still fit between the hood ridge and louvers.
The two stripes are parallel, and maintain a constant width from front to back - center spacing was driven by the hood ridge, hood louvers, and the license plate recess at the back.