Death, taxes, and the agony of rotary purists: three things that can be counted on from now until the end of time—especially if you decide to build a car like Khiem Pham’s ’93 Mazda RX-7. At first glance, Khiem’s FD might appear to be your typical well-developed, piston-free street warrior, but pop the hood and you’ll be confronted by the Wankel enthusiast’s natural enemy: a Toyota 2JZ-GTE. “When I was young, maybe 15, 16 years old, I would flip back and forth about whether I wanted a Supra or an RX-7,” he explains. “I had recently sold a project and was looking for my next one, and an old friend suggested I look into FDs. When I saw how much cheaper they were compared to Supras of the same vintage, I picked one up.” For Khiem, it was the beginning of a journey that would see him simultaneously realize his twin Toyota/Mazda fantasies within the same chimeric car, because almost as soon as he got the coupe home to Houston, Texas, from Colorado, the hunt was on for a Supra-sourced 2JZ to swap under the hood. Some of the groundwork had already been done, as the car featured a smaller displacement 1JZ from a previous swap, but it...