"There is an elegant simplicity in its design that made it instantly great when new and enables it to thrive almost six decades later." The small-block has been adapted in almost innumerable ways throughout the auto industry and beyond. Updated versions of the original Gen I engine are still in production for marine and industrial applications, while "crate engine" versions offered by Chevrolet Performance are used by thousands of enthusiasts every year to build hot rods. The 4.3-liter V-6 used in some Chevrolet and GMC full-size trucks and vans is also based on the small-block, but with two fewer cylinders.