The 1979-1993 Fox Body, most loved in 5.0L pushrod V8 form, is one of the most built platforms in Ford history: light, simple, and backed by a massive aftermarket. That makes big power cheaper here than almost anywhere. [VERIFY engine and output details for the years you cover.]
Induction and Fuel: A carb setup or an upgraded EFI system with supporting fuel is the foundation of any serious Fox build, sized to your power goal.
Heads, Cam, and Intake: The classic 5.0L power recipe. Better-flowing heads, a performance cam, and an intake wake the pushrod V8 up dramatically.
Headers and Exhaust: Long tube headers and a free-flowing exhaust are among the best value gains on the Fox, and they sound the part.
Forced Induction: Superchargers, turbos, and nitrous turn a Fox into a serious street or strip car, the platform takes boost well when built right.
Suspension and Driveline: Traction is everything on a light rear-drive car. Suspension, upgraded rear, and driveline parts put the power down.
Brakes and Chassis: More power deserves better stopping and stiffening. Round out the build so it drives as hard as it accelerates.