I have the same zinc plated votage regulator cover that's shown in the 41-48 Ford Book and always felt it was the correct one because "it's in the book" but now a car restorer tells me that it's not the right one. He says that all Fords in that era had black regulator covers. I just can't believe, after all the research put into the judging book that it would be incorrect. What is your take on this and which do you have?