It might work. They sound like they are Delawares. They aren't extended black, so their chick down is too light for the head spot that indicates barring to show clearly. You can try it, but don't count on black sexlinks from them. They would be good for breeding red sexlinks though. Since they are white with black, they are silver. Silver hens, when crossed with a red/gold base color rooster, will produce red sexlinks. Male chicks inherit their mother's silver coloring, pullets will be gold/red.
Marvellous! I also have a light brown little roo (could maybe get away with calling him "gold") so that would work also.
You've been so helpful - i really appreciate your advice