This Crankcase, L. is the most expensive of the items that make up this Crankcase / Oil Pump assembly.
The Screw,cross 6x40 is the most widely applied product in the ATC90 K2 1974 USA CRANKCASE / OIL PUMP ( nine times ).
The component with the lowest price in the CRANKCASE / OIL PUMP schematic is the Screw,cross,5x12.