This E-9 Crankshaft - Piston diagram displays the required parts for the C70 1981 (b) E-9 Crankshaft - Piston.
The E-9 Crankshaft - Piston is made up of components including this Shaft Comp Crank which is the most expensive.
In this schematic the "Roller, 2.5x10" is used most often.