The Pontiac Firebird Formula is a trim level ... the 1970 Formula 400 came standard with a 400 cubic-inch, 330-horsepower V8, while the optional 345-horsepower Ram Air III V8 engine (standard ...

However, the addition of Ram Air increased the maximum rpm from 4,800 to 5,200. Photo: eBay seller donmcmi_29 The 1967 Firebird in this photo is described as "an original 400 Firebird." ...