Mazda RX7

Editor’s Note: Over the next few weeks, OnAllCylinders will profile engines and engine builds by everyday high performance enthusiasts—hot rod hobbyists with DIY work ethics and real-world budgets. [portfolio_slideshow id=14688]   Don Teifke was hunting for a donor Mustang to support a future Factory Five Racing Mk4 Roadster build when he stumbled on this second-generation