1990 Dodge D350 Engine: 5.9L V8; Standard Rotation; Optional Heavy Duty Thermal Fan Clutch; OE Fan Clutch Height; w/ Heavy Duty Tow Pkg.;. 1991 Dodge D350 Engine: 5.9L V8; Standard Rotation; Optional Heavy Duty Thermal Fan Clutch; OE Fan Clutch Height; w/ Heavy Duty Tow Pkg.;.