340 HORSEPOWER at 5,300 RPM and 430-lb.ft. of torque at 3,600 RPM in the Firebird, with only a small throttle restrictor tab on the Firebird being different. It was the first engine that incorporated Pontiac's round-port head design in a production vehicle, however the intake port was the same as other D-port heads, leaving a head which exhaust port could nearly match the intake at high valve lifts. The Ram Air II also incorporated the first computer-designed camshaft. This camshaft sported a 308-/320-degree duration with lift. This same camshaft was also used in Pontiac's 1969–1970 RA IV production cars. However, the RA II was limited to a 1.50:1 rocker ratio, while the RA IV used a 1.65:1 ratio, which yielded significantly greater total lift and, therefore, superior flow and power. 400 Ram Air (1969) / Ram Air (1970), aka Ram Air III Often called the "Ram Air III", this engine was officially called the "400 Ram Air" for 1969 and then simply "Ram Air" for the 1970 model year. It would later become known colloquially as the "Ram Air III", though Pontiac never called it by that name. A 400 cubic inch ram air equipped V8, it was an option on the 1969-70 GTO and Firebird Formula. For the 1969 and 1970 model years it was the standard engine in both the Firebird Trans Am and the GTO Judge. It was the same engine as the '67-'68 400 HO but for 1969 and 1970 it included a driver-selectable outside air induction system on the GTO(it was a separate option on Firebird), with the hood vents opened and closed using a knob located under the dash, below and to the right of the steering wheel, its bracket labeled "RAM AIR". It used the "744" camshaft (301-313) in the earlier manual trans versions, later downgraded to the "068" version, and the 288/302 duration cam with automatic transmission. It was rated at (gross) in the GTO version. Like previous generations of Ram Airs, it used Pontiac's special cast-iron "headers". It had 2-bolt main bearing caps in 1969, but went to a block similar to the Ram Air IV's in 1969 that was drilled for 4-bolt main bearing caps (but used a cast crank and cast rods). In 1970 the casting number #9799914 Ram Air 400 4-bolt main block also used the 4-bolt main caps on Ram Air applications. Ram Air IV (1969-1970) The