19. Ford Mustang Tunnel Port 302 Engine
One of the most mythical engines in Mustang history was the ill-fated 1968 Tunnel Port 302 V8. The engine was one step from entering full production, but the top brass at Ford was concerned about the cost and reliability. So, they stopped it before it could hit the streets. The 302 Tunnel Port was a short block V8 with 5.0-liters of displacement and over 400 HP on tap.
The secret was the design of the engine heads that allowed for perfect breathing and; thus, high horsepower and torque ratings. And the Tunnel Port V8 could rev up to 8,500 rpm. Those numbers were unheard of in 1968. Although it proved successful in racing, Ford never sold it to the public. So, the Tunnel Port 302 remained a legend among Mustang fans.