The saying goes that big things come in small packages. The 400 small block goes along with this saying and provides serious power in a smaller package than its big-block relatives. The 400 cubic-inch displacement was the largest size available from auto manufacturers. It first made its appearance in 1970 as a V8-engine block from major manufacturers, like Chevrolet, Buick, Pontiac, Cadillac, and GM. A 400 small-block engine has been a popular choice for American muscle car fans and hot rodders since the 1970s. Since that time, more than 10 million 400 small-block engines have made their way into cars around the country. Whether you are working on restoring a classic car or need a strong engine to build a custom car, you can find a 400 small block in the large inventory on eBay. No matter if you want to make your car purr like a kitten or roar like a lion, the small-block engine has the power and performance worthy of any muscle car.Shop the large inventory of motors, parts, accessories, and complete car and truck engines!