While some mourned losing the turbocharged V-6, Pontiac consoled them with GM's new normally aspirated Twin Dual Cam V-6, a 24-valve 3.4-liter rated at 210 bhp with five-speed manual or an even 200 with that year's new four-speed automatic option. Standard for GTP, this engine was ...
five main bearings, and a Rochester QuadraJet to make 325 horsepower. The L67 made the same power, but had a Ram Air package that made the hood scoops functional, used a hotter camshaft, and low-restriction exhaust manifold.
The new version was just as thoroughly re-engineered as the 303, but with a very different set of design priorities. Where the Ram Air V had a reinforced block, massive ports, and a hefty forged crankshaft with four-bolt main bearings, the new engine had thinner cylinder walls and internal...