A performance upgrade package designed for small-block Chevrolet (SBC) engines, this aftermarket assembly increases the engine’s displacement to 427 cubic inches through a longer crankshaft stroke. This modification involves replacing internal components, typically including a crankshaft, connecting rods, and pistons, engineered to work together to achieve the desired displacement. For example, an original 350 cubic inch SBC can be transformed into a much larger displacement powerplant using these components.
The principal benefit of increasing displacement in this manner is a substantial increase in torque and horsepower output. This enhanced power translates to improved acceleration, towing capability, and overall vehicle performance. Historically, increasing engine displacement has been a straightforward approach to achieving more power. This method has been embraced by enthusiasts seeking to maximize their engine’s potential for both street and racing applications.