When Morrison Knudsen announced their intention to build new high horsepower MK5000C locomotives competing with EMD and GE back in the early 1990s, EMD ceased sales of parts to the MK companies. MK responded with a program which sought replacements for most of the significant parts of the EMD engines and locomotives. One such item was the 16-645F3 engine crankcase, and a replacement was designed which differed in several respects from the EMD crankcase but accepted all the same reciprocating and rotating parts. The task of acquisition of engine crankcases was assigned to MK Engine Systems of Latham, New York, working with a contractor in Poland. MK subsequently spun off the rail operations as MK Rail, which later became Motivepower Industries. Motivepower then was merged with Westinghouse Air Brake to form Wabtec, and Wabtec subsequently decided to sell several operations, including Engine Systems, to General Electric. Thus GE ended up with the Polish built substitute 16-645F3 crankcase, and is still producing them. Is everybody completely confused now?