Very good effort diesel boy.
Its very difficult to design cars from 1970s, using the computer softwares, as those were designed using pencil and sketches.
The Japanese started designing the cars using computers, as you can tell from the Sharp Lines of early Corolla, Civic, etc. from 1980s. The Americans were a bit late in computer designing. The most famous of which was a car, AMC, rambler they tried to copy the Japanese cars during early 1980s, making straight Plastic bumpers, but the car's design engineering area was weak, the bumpers developed hairline cracks on the American AMC, ramblers, and started to fall off. But now, the Americans have caught up in various designing areas, but their Engine engineering is still two decades behind the Japanese.