The Ram Air III also had chrome valve covers and a mandatory hood sourced cold air induction system just like Pontiac's other Ram Air 400 V8s. The Ram Air III like all the other Pontiac V8 engines produced from 1966-1970 was painted in Pontiac Light Blue Metallic, one of the best looking colors to grace an engine block. This is why so few Ram Air IV V8s were produced. The Ram Air III was the smart choice since it was less expensive for buyers yet produced about 95% of the power of a Ram Air IV. Since it had a cast iron intake and D-port heads the Ram Air III was much more economical for Pontiac to produce than the Ram Air IV which had an aluminum intake manifold and round-port heads. Hot Rod magazine back in 1970 test drove a Ram Air III 1970 Firebird Formula which went 0-60 mph in 6.0 seconds and the quarter mile in 14.2 seconds. The cold hard truth was the Ram Air III's horsepower was underrated, its actual horsepower output approached 400 gross horsepower territory. The horsepower and torque differences were on paper only, the horsepower and torque figures were the same no matter which of these vehicles the Ram Air III V8 was found. The Ram Air III was rated at 335 gross horsepower and 430 lb-ft of torque in the 1969 Firebird, 1970 Firebird Formula, and 1969-1970 Trans Am and rated at 366 gross horsepower and 445 lb-ft of torque in the 1969-1970 GTO and GTO Judge. The Ram Air III was the standard engine in the 1969-1970 Pontiac GTO Judge and the 1969-1970 Pontiac Trans Am. The Ram Air III was available with the 1969-1970 Pontiac GTO, 1969 Firebird, and 1970 Pontiac Firebird Formula when RPO code L74 was selected on the order sheet. The engine is the same size as later 400's. You'll need to explain a bit more about the hood fitment issue. There are block codes and engine codes that will help determine if the engine was from a GTO or Firebird. These heads will also require special intake manifolds.Ģ.11 Intake Valve, Screwed Stud, Auto TransĢ.Here's the info a quick search turned up for me. The Ram Air IV also has a taller intake port and the Ram Air V has Round Intake ports. Make sure to use the correct intake manifold. From 1972 up Pontiac also changed the head’s exhaust crossover. From 1967 to 1979 Pontiac engines used the same pushrods, Rocker arm, and valve covers. However, they are harder to find and like the 1967 heads, they have a closed combustion chamber.Įxcluding the Ram Air IV and Ram Air V heads. The 19 Super Duty engines would work well also. Then the best option would be to choose a high output Pontiac heads produced from 1967 on. There are aftermarket heads available but, If you don’t want to use aftermarket heads. Looking for a performance head for your Pontiac? These heads flow better producing more power than the heads produced pre-1967. The high output heads produced by Pontiac after 1967 used bigger intake and exhaust valves and a 14-degree valve angle. Pontiac heads produced PRE 1968 used a closed combustion chamber design while heads produced from 1968 on used an open chamber. Except for some special heads the bolt pattern, the bore spacing, and deck heights are the same. All Pontiac V8 cylinder heads from 1955 to 1976 are essentially interchangeable. Pontiac used different valves and combustion chamber size for their V8s to change compression ratios, fuel economy, and horsepower output. Over the years Pontiac v8 Cylinder heads came in many specifications. Ram Air III Pontiac Heads Pontiac V8 Cylinder Heads.
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