This 1965 Ford Mustang Fastback started life with the mildest 289 V8 Ford offered, then got rebuilt with Trick Flow heads, an Edelbrock intake, and a fresh cam to make 330 horsepower on the dyno, more than even the rare factory HiPo version ever produced. The exotic European-inspired Fastback shape hides a genuinely modern small-block underneath. Read on to see how a basic A-code engine got transformed into something the factory never built.