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Chevrolet and GMC Truck Information: Silervado, Sierra, and Colorado

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Chevy Engine Block Terminology

May 3, 2018 by Jake Mayock 1 Comment

Engine Block Terminology

What’s the difference between a small block and a big block? How about a short block and a long block?

Short Block: An engine WITHOUT the head(s). Usually includes the crankshaft, camshaft, and pistons.

Long Block: An engine WITH the head(s). Usually does not include the oil pan, valve covers, and manifolds.

Small Block: The smaller of a manufacturers two series of engines. In the case of Chevy, the small block includes the 262, 265, 267, 283, 302, 305, 307, 327, 350, and 400.

Big Block: The larger of a manufacturers two series of engines. In the case of Chevy, the 366, 396, 402, 427, and 454.

Notice the overlap of small and big block displacements. Note also that a small block can be a long block. The terms define different characteristics of the engine.

Filed Under: Classic Chevy Trucks

About Jake Mayock

Jake is an automotive enthusiast who has been blogging about Chevy's and European cars for years. With technical knowledge on performance modifications and engine problems, Jake has a passion for helping car enthusiasts fix problems and achieve their performance goals.

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Comments

  1. EC Wilson says

    April 18, 2022 at 10:11 am

    looking for long block rebuilt 400in, SMALL BLOCK

    Reply

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