A performance upgrade package designed to increase the cubic inch displacement of a 350 cubic inch Pontiac engine, this assembly typically includes a crankshaft with a longer stroke, connecting rods, and pistons. This modification effectively increases the distance the piston travels within the cylinder, resulting in a larger volume and, consequently, greater power output. For example, a 350 Pontiac engine, when fitted with this type of kit, might have its displacement increased to 383 or 400 cubic inches.
The significance of enhancing an engine in this way lies in the potential for substantial performance gains. By increasing displacement, the engine is capable of moving more air and fuel, leading to improved torque and horsepower. Historically, these kits have been popular among automotive enthusiasts seeking to enhance the performance of their classic Pontiac vehicles for street, strip, or racing applications. The increased power can significantly improve acceleration and overall driving experience.