So I have a shock color question, but I don't think they were assembly line shocks. Every year at All Ford Columbus one of my first stops was a vendor who always bought loads of NOS parts that were returned to depot by Ford dealers. He generally had 100 - 200 shocks in their original boxes. Some were assembly line, many were service replacement. One year he had a pair of front shocks that were white and had Shelby stickers on them. I looked at them very closely and engraved in each shock was "Gabriel Strider". They were typical looking 1965 - 70 style front shocks that had been sitting in some dealer's parts bin for decades.
What was I looking at? He was asking $200 for the pair, this was in the 1990's and I was more interested in the C7WY and C8WY shocks that were selling for $15 - $25 each.