If you're over the age of 30, you probably remember Datsun. The Fairlady Roadsters and 240Z Coupes roamed the streets in America from the late 50s until the very early 80s. And, if you're looking for it, you might still see a Datsun pickup or two cruising around. But, in 1981, the Japanese automaker decided to market purely under their Nissan name to unite the lineup around the world. And since then, Nissan…