I am working on a 68 GT 350 convertible 2646 built 03/11/68. At some point the leaf springs were replaced with some D0ZA 5556-G springs (for a Boss 429). I am looking for someone that may have a car built near that date that can tell me what part numbers are on their springs. The MPC lists C7ZA 5556-AL or AM springs. I am looking to buy entire set of original springs or just the bottom leaves.