Chevy Big Block Water Pump Pulley 1 Groove, Short Water Pump (396-427-454) This pulley has been CNC machined in the USA from a solid bar to ensure that it is balanced and runs perfectly true. We machine them at ultra high speeds to get an amazing surface finish then hand polish each part to a mirror finish so that it really makes your engine stand out from the crowd. Technical Specs: Note: Big Block Short Water Pumps (SWP) are 5.75" from face of water pump to block. Water Pump Pulley BBCS1WP Grooves: 1 Diameter: 6.2" Overall Length: 2.85" Material: 6061-T6 Billet Aluminum Made in the USA!.
