The Roller,5x8.5 is the lowest priced item on this Camshaft - Lower Rocker Arm schematic.
Parts such as the Camshaft - Lower Rocker Arm: Gear,tachometer, Holder,camshaft, Bolt,flange,6x28, Gasket,camshaft (mca) are included in the Cx500 1978 France Camshaft - Lower Rocker Arm parts fiche.
With a quantity of four pieces, the Sp A, Rocker Arm is the most used part in the CAMSHAFT - LOWER ROCKER ARM diagram.