Here's why:
* Displacement: The "350" refers to its cubic inch displacement (5.7 liters). While a big block can also be around 350 cubic inches, the defining factor is the engine's overall size and design.
* Block Size: Small block engines have a smaller overall block size compared to big blocks. This means the cylinders and crankshaft are closer together, resulting in a more compact design.
* Valve Angle: Small blocks typically have a 90-degree valve angle, while big blocks have a 45-degree angle.
The Chevy 350 is a very popular and well-known small block engine that has been used in countless vehicles over the years.