What Chris said.So, what about a 240z,260z,280z where the spec line is different but the body is essentially the same?
Tom, here's the litmus test: if you were to take a 260z body and "build" a 240z race car, strip all labels and VIN, and a Datsun afficianado were to pore over your car and be completely unable to determine that the car started life as a 260z, then it's legal.
But, if the afficianado can go "aha! That bracket (or panel, or whatever) never came on the 240z! This is a 260z" then it's illegal.
It's really that simple: you cannot create a model that didn't exist before. But you can use another body to replicate one that did. - GA