Chevrolet Performance has officially discontinued the LS9 Long Block V8 engine, marking the end of one of the most potent factory-engineered small-block crate engines ever offered by General Motors.

Anything over 400 cubic inches is usually considered a big block. However, there are some manufacturers who produce 427-cubic-inch small blocks.

When it comes to engines, the term "block" can mean a few things. There's big block versus small block and short block vs long block, but at the heart of the matter is the engine itself. The ...