I can't believe you're going to drive it in winter. I realize that's what Eagles are meant for, but if I had that much time, effort, and money invested into one... well, I'd do my best to ensure it never saw snow or road salt again.
I drive my '86 wagon year round, but I have a very minimal investment into it. I'm pretty diligent about washing it frequently during winter to keep the salt knocked off, but rust is still becoming a problem.
There's not only the rust factor, but the other drivers around you. All it takes is one idiot with bald tires and/or no concept of winter driving, and your many years of work is negated in a second.