The C.d.i. Pulser 81-85 is made up of components including this Advancer,spark which is the most expensive.
Some items from this specific schematic: Gasket,point Base (nas), Gasket,point (nas), Advancer,spark, Gskt,pulse Gen (mca).
The lowest price component in this C.d.i. Pulser 81-85 parts-list fiche is the Bolt,hex 6x14.