1987 Chevrolet R20 Suburban Engine: 5.7L V8; Standard Rotation; Optional Heavy Duty Thermal Fan Clutch; OE Fan Clutch Height;. 1988 Chevrolet R20 Suburban Engine: 5.7L V8; Standard Rotation; Optional Heavy Duty Thermal Fan Clutch; OE Fan Clutch Height; Fan Mounting Holes are 5/16 In.;.
