400 cars only bring the high dollar if they have the original drive train. The paperwork only matters on numbers matching cars. Once the original engines are gone the playing field is level. Then they are all just 'fun' cars. If you have a fun car all you have to do to make it worth the most possible is make it quality and fun. These fun cars are going for high amounts too. A high quality non numbers matching 1st generation Firebird convertible can be worth upwards of $25K(easily). It has to appeal to many for it to be valuable on the market. If you are an investment minded 1st Gen owner then watch which cars go for good money and adjust your car to meet the market demands. I've seen some entirely non original cars tastefully altered bringing very good money lately. For a recent example here's a coupe that was altered and brings a good price. Notice that it started life as a 6 car. I think there was room for improvement so the price could have been higher; http://cgi.ebay.com/ebaymotors/Pro-Touri...1QQcmdZViewItem
