Note: A different type top end washer is used for each type of connecting rod and cannot be mixed between the connecting rod types.
Bottom Guided Rod - 0.812 in. (20.59 mm) thick. Early style....the connecting rod bottem end is guided by the inside surfaces of the crankshaft and the top end is able to move horizontally on the piston wrist pin. Top end washers which are stepped on one side are used with this rod.
Top Guided Rod - 0.712 in. (18.08 mm) thick. Later style...The connecting rod top end is guided by the inside surfaces of the piston and the bottom end is able to move horizontally on the crankshaft. Top end washers which are flat on both sides are used for this rod.
