1929. From 1930 through 1935, Cadillac produced a version with an increased displacement of . This used a bore and stroke. This engine was used in the Cadillac Series 353 and Series 355. Monobloc A "monobloc engine" was used in 1936's Series 60. It was designed to be the company's next-generation powerplant at reduced cost from the 353 and Cadillac V12. The monobloc's cylinders and crankcase were cast as a single unit, and it used hydraulic valve lifters for durability. This design allowed the creation of the mid-priced Series 60 line. Bore and stroke was . This engine was closely related to a monobloc design earlier introduced in the modified with a bore for the 1936-1948 engine. This was used in the Series 60/60S/61/62/63/65/67 and 70/72/75. It was also used in a dual setup in tanks, e.g. M5 Stuart and the M24 Chaffee, in World War II mated to a Hydramatic transmission. LaSalle In 1937, the new monobloc flathead gained in Cadillac V-8 models to , while the LaSalle straight-8 of 1934–1936 that originated from Oldsmobile actually was replaced with the 1936 smaller version at . In 1941, the LaSalle nameplate was phased out along with the , and Cadillacs, all powered, were available with the new Hydramatic automatic transmission which debuted in Oldsmobile the previous year. These engines were produced through 1948. OHV 331 series For 1949, Cadillac and Oldsmobile each produced a new V8 design (the Oldsmobile engine was the 303). Both of the engines were overhead valve designs, pioneered by Buick. The Cadillac 331 engine featured a "dry" (coolant exited through an assembly attached directly to the cylinder heads), open runner (requiring the use of a tappet valve cover) intake manifold, rear-mounted distributor, and shaft-mounted rockers. Crankshaft end play is carried by the rear bearing on the two GM engines. It has the lighter 'skirtless' block where the oil pan flange does not descend appreciably below the crankshaft centerline and they both have a partial integral cast iron clutch housing that compares to the early Chrysler Hemi V8 design. 1955 331 engines went to a lighter "flat back" that bolted to a clutch and flywheel housing at the front of the transmission. Bore and stroke are for an overall displacement of . This engine features an oiling system which uses a central cast-in passage between the lifter galleries feeding oil to the cam and crank by grooves