There are several decisions that the home mechanic has to make when doing an engine overhaul; the key decision is the state of the engine block. Other considerations are cost, proximity to the machines in the machine shop, inventory of spare parts, time taken in completion and the applicants past work experience. Cost differentials in rebuilding alternatives can be primarily across; quality of parts, required machine work and tools and equipment. Both complete long and short block assemblies and repair parts are available in most automotive parts stores; thus, it is advisable to speak to stores in order to determine the prices and availability of such assemblies. Thus, if the inspection confirms that most of the parts of the engine block and elements of the unit can be reused, it is better to purchase the required ones and, in the case of the selected block, crankshaft and piston/connecting rod assemblies, it is necessary to carry out a thorough examination. A short block refers to an engine block with crankshaft and piston /connecting rod assemblies already fitted into their holes on the engines; possibly minimal machine work has to be done to fit existing parts into the engines. On a long block there is an oil pump, oil pan, cylinder head, valve cover, cam shaft, the train of valves , timing sprocket and belt new bearings, seals, gaskets. One should assess which of the choices is most suitable and it is recommended to consult with local auto machine shops or dealers or with other rebuilders before buying such components.