Rated at 320 horsepower in 1967, the S-code 390-cubic-inch V8 was the first big-block engine ever offered in the Ford Mustang ...

A 1967 Ford Mustang fastback found after decades of neglect ... pony car was a rare factory S-code model, equipped with a 390 ...

Base Custom 1967 Ford Mustang features Roush 347 SR engine ... It was offered with a wide range of powerful engines, including the 390-cubic-inch V8, which delivered impressive performance.