Part Type: Engine Cooling Fan Clutch. Standard Rotation Thermal Standard Duty Fan Clutch. Fan Clutch. 1974 Ford E-100 Econoline Engine: 3.9L L6; Standard Rotation; Standard Duty Thermal Fan Clutch;. 1969 Ford E-100 Econoline Engine: 2.8L L6; Standard Rotation; Standard Duty Thermal Fan Clutch; w/ 17 In.