Galvanizing was started for the early '86's at least. I actually thought it started with the revised body style in 1985, but am not certain. As I recall, the 5K's had full body double sided galvanizing. The 4K's had the body panels galvanized, but I don't believe the top was galvanized, don't know about the hood. My 4K had a 5 yr, 100Kmile rust warranty. Never needed it though. Bill