On this parts fiche the Bolt,flange,6x18 is the most specified component.
Parts such as the Mt Clutch-flywheel: Spring, Clutch Stop, Flywheel Comp, Plate Assy,press., Spring, Clutch, Diaphragm are included in the Civic 1978 2dr1200 (ka) Mt Clutch-flywheel parts fiche.
The most expensive part in this assembly is the Flywheel Comp.