For 1968, the same basic 400 remained, now rated at 330hp at 4,800 RPM and 430-lbs.ft. of torque at 3,300 RPM, and equipped with "16" cylinder heads; "62" heads were used on some automatic cars. Pontiac also added the L74 400 H.O. engine, using the "067" cam on automatics and the 288/302-duration "068" on manuals, both rated at 335hp. Pontiac also added the L74 400 H.O. engine, using the "067" cam on automatics and the 288/302-duration "068" on manuals, both rated at 335hp.
Ram air had a different engine block casting and got a 4 bolt main. Not sure if that was both Ram Air 1 or 2 or both.
Same exhaust manifolds, different cams. Different Carb and dist numbers. Rated the same HP but just on paper.
