Chevrolet launched its 327 cubic inch small block as an possibility for its full-size vehicles and station wagons for the 1962 mannequin yr. To create the 327, Chevy used the identical small block design based mostly on the 4.40-inch cylinder spacing as earlier SBC engines. However, engineers elevated the cylinder bore diameters to 4.00 inches and used a brand new crankshaft with an extended, 3.25-inch stroke. The base 327 made 210 horsepower utilizing a two-barrel carburetor and an exhaust system that pressured each cylinder financial institution exhaust manifolds right into a single restrictive pipe.

Other variations of the 327-cubic inch SBC with 250-, 300-, and 340-horsepower scores had been utilized in Chevrolet autos reminiscent of Malibu, Impala, El Camino, Chevelle, and Chevy II between 1962 and its discontinuance from manufacturing utilization in 1969. These 327 variations used 10.5:1 or 11.25:1 compression ratios, four-barrel carburetors, and free-flowing dual-exhaust programs to realize horsepower beneficial properties and as much as 360 lb-ft of torque.

From 1962 to 1965, Chevrolet produced the highest-horsepower 327 engines for the Corvette. Those performance-oriented 327 variations produced between 365 and 375 horsepower, relying largely on which score Chevrolet felt would promote extra vehicles and the kind of gasoline induction system they used: Holley four-barrel carburetors or Rochester gasoline injection. For instance, the 1964/1965 Corvette 327 used 2.02-inch diameter consumption valves (in comparison with the 1.94-inch consumption valves used beforehand). However, it was nonetheless rated on the most 375 when outfitted with the Rochester gasoline injection system or 365 horsepower with the Holley four-barrel carburetor.