There's no question about it: If you want to blow minds with a vintage sports car, a classic Ferrari, a Porsche, and even a Mustang are all surefire ways to do just that. And Lord knows we here at GQ Style love those cars. But if you want to blow the right minds—the connoisseurs, gearheads, speed freaks, and taste gods—it's all about the early-'70s Datsun 240Zs right now. These Japanese marvels of mechanical engineering entered the American market as reliable, affordable, high-performance alternatives to the European imports that dominated when it came to exotic horsepower. And despite several decades of ripping up the roads (and being made of some highly rust-prone steel), many of them have survived and remain worthy rivals to their more popular (and far more expensive) Western counterparts. Thanks to that and the laws of scarcity, they're hotter now than ever, and those who truly get it are rabid for them. Here, in the words of some of the most obsessed and lead-footed among them, is the story of the incredible Z-car.