Personally, I think numbers matching stuff on a 1-of-500,000 car is a waste of time. Anyone that thinks their drum brake, 289, 2 barrel carb, auto trans car is worth more stock than tastefully modified is dreaming. When I built my clone, I started with an extremely clean, one-owner fastback with a bench seat (1 of 256). I gave the stock 289 to my Dad, the trans to a friend, threw the stock brakes in the trash and parted out all the stock stuff I wouldn't be re-using on ebay. I promise the car is nicer than ever and more valuable than ever.