If I remember correctly, the cd for a 280zx is .38. The 70-78 cd was .43.
When saying that cars are going to look the same, thats happened years ago. I'm 36, and can pick out and name any car on the road today. There are all kinds of ways for me to tell the difference between cars, even though they are quite similar. But throw me in a car show, with cars from the 1940's and older, and I cant tell a Buick from a Ford or a Chevy from a Mercedes, unless I can read it on the car. So to me, cars have always, and will always look the same, generally speaking.