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.

The 60s are gone now, but Bring a Trailer exists, and so does this 1967 Shelby Mustang GT500 Fastback ... to Carey Paul Ford ...

Customers who wanted the fastback had to pay at least $2,592, while the convertible was the most expensive at $2,698. Photo: eBay seller aviationwise1 The 1967 Ford Mustang in these photos is all ...