R-LOK CRANK ADAPTER SB CHEVROLET

KRC's 1.245" small block Chevrolet crank adapter will align the crank pulley with any KRC water pump pulley mounted on a 5.795" long water pump. If your water pump measures 5.545" long you can use either a .250" water pump flange spacer or a .250" water pump gasket spacer to align the water pump pulley with the crankshaft pulley. If your water pump measures 5.595" long you can use either a .200" water pump flange spacer, a .200" water pump gasket spacer or our 1.045" R-LOK crank adapter to align the water pump pulley with the crankshaft pulley.