Each engine is professionally pre-assembled in a controlled environment to check all tolerances on bearings, crank journals, end play, piston clearance in cylinder, piston to valve and deck clearance are all checked and set. Head ccs are checked. The static and dynamic compression ratio is set for maximum horsepower with the desired fuel octane. Camshaft degree is set along with correct valve train geometry. Oil pump pickup clearance is set for proper oiling. Each bolt is torqued to proper specifications using top quality calibrated torque wrenches.