The black stripes will look good. My best friend in high school had a red 70 340 Duster that had white stripes from the factory. He had it repainted, and went with black stripes because it had black interior...and it looked good. I had a 70 Gold Duster that was FJ5 with gold stripes and a black vinyl top. I'm building a 70 Duster that will be FJ5 with a black vinyl roof, and a 5.7 Hemi with a 5 spd automatic. I'm torn on whether to replicate my old car and do gold stripes, or do black....which is what I'm leaning towards.