This offering allow you to build your own short block engine from the block up by scratch: controlling all parts and options to be used. Think of it as building a sandwich at SUBWAY sandwich shop where you start with type of bread selection moving on to the sandwich filling of all the goodies you want inside, down to even the last seasoning condiments. No cookie cutter generic crate engine here. We give you all the control to make your one of a kind custom engine in your choice of LS/LSX, Big Block Chevrolet, or Small Block Chevrolet. The base short block engine consists of a balanced custom rotating assembly installed in a fully machined engine block of your choice, with cam bearings and plugs installed. You may upgrade for a charge over base buy it now price to a more complete package by contacting us, or purchasing our online custom long block engine item by inserting CUSTOMLONGBLOCK in seach site search engine.