At 67cc, the Ram Air V’s combustion chambers were smaller than other Pontiac Ram Air engines, which were 71cc or 72cc, but it used the same 2.11/1.77-inch valve sizes.

After developing the 287, Pontiac ... engine that was well-received by many mechanics. While the Firebird came with a 326, those interested in the larger engine could opt for the 400 or the 400 ...

The standard ‘67 Firebird engine was a 230 cubic inch (3.8 Liters ... the W66 and the L67 Ram Air. The W66 came with a two-barrel carburetor and 285 horsepower. The range-topping L67 Ram ...

Introduced for the 1964 model year, the Pontiac GTO remained in production ... this GTO was ordered with the 400-cubic-inch (6.6-liter) Ram Air III V8 engine and an automatic transmission.