On this parts fiche the Washer, Lock is the most specified component.
The most expensive part in this assembly is the Advancer,spark.
Parts such as the Pulse Generator: Base Pulse Gen, Packing,pulse Gen (nas), Oil Seal,15x25x7, O,ring.2,5x75 are included in the Atc200es Big Red 1984 (e) Usa Pulse Generator parts fiche.