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Although it had had a larger displacement than its 261-cubic-inch (4.3 L) Stovebolt predecessor it was approximately 2 inches (51 mm) shorter and 1 ⁄ 4 inch (6.4 mm) lower. [54] Flywheel bolt pattern is the same as the six and V8, with 1 ⁄ 2 inch (12.7 mm) bolts for the flywheel if produced after the 1966 model year.
This block is one of three displacements, 302/327/350, that underwent a crankshaft bearing diameter transformation for 1968 when the rod-journal size was increased from the 2 in (50.8 mm) diameter small-journal to a 2.1 in (53.3 mm) large-journal and a main-journal size that was increased from 2.3 in (58.4 mm) to 2.45 in (62.2 mm).
The Chevrolet Stovebolt engine is a straight-six engine made in two versions between 1929 and 1962 by the Chevrolet Division of General Motors.It replaced the company's 171-cubic-inch (2.8 L) inline-four as their sole engine offering from 1929 through 1954, and was the company's base engine starting in 1955 when it added the small block V8 to the lineup.
Chevrolet 153 Inline 4 (Chevy II, pre-Iron-Duke - includes the Vortec 3000/181 industrial/marine crate motor) Detroit Diesel V8 6.2L and 6.5L; Duramax V8; Generation III V8s with modifications. These modifications include an additional bolt hole at the top of the pattern, and attachment points for cast oil pans to lower bellhousing extensions ...
The 90° V6 engine uses the same transmission bellhousing pattern as the Chevrolet small-block V8 engine. The oil pan dipstick is located on the passenger side above the oil pan rail; this design was phased in on both the 90° V6 and Small Block Chevrolet assembly lines (for engines manufactured after 1979) sharing the same casting dies.
The Chevrolet small-block engine refers to one of the several gasoline-powered vehicle engines manufactured by General Motors. These include: The first or second generation of non-LS Chevrolet small-block engines; The third, fourth, or fifth generation of LS-based GM engines; The Chevrolet Gemini small-block engine
The 260, also known as the 259, displaces 259.2 cu in (4.2 L; 4,247 cc) and was introduced in the middle of 1955 by Plymouth. It was a bored-out 241, having a 3 + 9 ⁄ 16 in (3.5625 in) bore and keeping the 3 + 1 ⁄ 4 in (3.25 in) stroke (90.5 mm × 82.6 mm). This engine was also used on 1955 and 1956 Dodge trucks.
The 150.8 cu in (2.47 L) is commonly referred to as the "Iron Duke" and is a Pontiac design. It was purchased by AMC from 1979 through 1983 as the base option in the RWD Spirit and Concord, the 4WD Eagle models, economy versions of Jeep CJs, and in postal Jeeps. This early version used a Chevrolet small block V8 bell housing bolt pattern.