Check the listing for details. Big Block Chevy Serpentine System Electric Water Pump PS ALT EWP 396 427 454 BBC. Condition: New other (see details), Made in United States. Listed at 329.95 USD. Chevy Big Block Pulley Serpentine System for Power Steering Electric Water Pump (EWP) (396 - 427 - 454 CID) The BEASTTM 8 Track Serpentine System for Big Block Chevy engines with Power Steering and Alternators a unique eight rib Serpentine pulley designed to increase the grip, reduce stretching and prevent belt slippage. Compared to the traditional six rib V-Belt system, you'll get more power and up to 30 percent more traction to the serpentine system than you would with any other type of pulley configuration. Mounts Saginaw P Series Power Steering pump low on driver side and puts alternator on the passenger side in a mid-mount configuration. Uses standard Chevy electric water pump.