To answer Dave's point on The Escort Twin Cam/Mini Cooper etc there is no problem with these being built from a lesser body provided the car is true to the period. The point I was trying to make is that there is/was only one Custaxie/Carney Escort/Spears Escort etc and in my opinion unless one has the majority of the origional car with which to build another then that car is lost forever. The point here is that the likes of the Coppins Zephyr Corvette were such iconic cars that if they could be found and rebuilt to origional specs should be allowed in. To build one from scratch today is to build a hotrod.
Allan