So I think I found my 4th mustang. Its a 1966 Coupe with the 200 6 cylinder sprint package. Everything on it is original and is numbers matching. The car needs a restoration but the engine and tranny are in good shape and the car has no rust that I could find except for some slight surface rust. I can pick it up for a song... but I'd like to know more about the spring package i.e. any way to know how many were made, what exactly was included etc.