Long Aluminum Water Pump Satin High Volume for SBC Chevy Fit 1969-87 small block or 90 degree V6 passenger cars , 1973-89 light duty trucks. Brand new High Performance Long style aluminum water pump Block to hub measurement is 6 15/16". Large 3/4" bearing with 5/8" shaft. Natural finish Billet body and impeller provide tight clearances for excellent flow characteristics.