First off, I realize this thread is a bit dated. But I have some older first-hand info that may be of interest. In 1972, as a 19-year-old, I purchased a 1966 Satellite from the local used car dealer in Essex, Maryland. The car was immaculate - silver with red interior, 318, automatic. When purchased, it had the standard, plain, body-colored cap. Given the condition and young age of the car, I'm assuming it was the original factory cap. Unfortunately I can't recall any other Satellites from back in the day. But it seems odd to offer a optional cap from the factory - especially when the Satellite was basically its own trim package.