1975 Ford E-250 Econoline Engine: 4.9L L6; Standard Rotation; Standard Duty Thermal Fan Clutch;. 1975 Ford E-250 Econoline Engine: 5.0L V8; Standard Rotation; Standard Duty Thermal Fan Clutch;. 1975 Ford E-250 Econoline Engine: 5.8L V8; Standard Rotation; Standard Duty Thermal Fan Clutch; w/o A/C;.