The lowest price component in this Crankshaft/balancer ('81-'83 D2/ parts-list fiche is the Screw-pan Head,6x8.
Some items from this specific schematic: Screw-pan Head,6x30, Roller,4x8, Shaft Idler,balancer, Bolt, 6x32.
With eight applications this Bushing,crankshaft,bl is the most specified part.