Billet Aluminum Chevy Small Block Water Pump Pulley V-Belt Short Water Pump (SWP) V-belt, 1 Groove Water Pump Pulley fits Chevy 283, 302, 327, 305, 350 and 400 engines with short water pump. Designed for use with stock power steering and alternator brackets. NOTE: SHORT WATER PUMP ENGINES ARE 5.87" FROM FACE OF WATER PUMP TO BLOCK. Chevy 283, 302, 327, 305, 350 and 400 engines with short water pump ---1962 - 1968 Chevy Small Block Engines came with the short pump from the factory DIAMETER: 6.4" OVERALL LENGTH: 3.0" GROOVES: 1 BOLT PATTERN: 4 BOLT BOLT CIRCLE: 1.75" PILOT DIAMETER: 5/8".