1970 Chevelle 496 Big Block Walk Aaround 3

The 1970 Chevrolet Chevelle was not available from the factory with a 496 cubic inch (8.1L) engine. The largest displacement engine offered by Chevrolet for the Chevelle during that time was the 454 cubic inch (7.4L) Big Block V8.

However, many Chevelle enthusiasts have performed engine swaps or built custom engines to increase the performance of their vehicles. To create a 496 engine, the original 454 engine can be stroked and bored to increase its displacement.

Stroking involves using a longer crankshaft to increase the distance the piston travels in the cylinder, while boring refers to enlarging the cylinder bore to accommodate larger pistons. These modifications can increase the engine’s displacement to 496 cubic inches.

The specific power output of a 496 engine will depend on various factors, including the components used, such as the camshaft, cylinder heads, intake manifold, carburetor, and exhaust system. It’s common to see custom-built 496 engines producing well over 500 horsepower.

Building a custom engine or performing an engine swap requires technical knowledge, experience, and careful planning. It’s advisable to consult with professionals or engine builders who specialize in high-performance engines to ensure proper installation, compatibility, and optimal performance.

It’s also important to consider that modifying the engine may have implications for emissions compliance and legal requirements in your region. It’s crucial to research and adhere to local regulations when making such modifications.


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