Brand New Chrome Steel Pulley kit. This kit will work on 1969-85 small block Chevy 283-350 with a "LONG" water pump. Our kit includes (1) Chrome Double Groove Water Pump Pulley. This water pump pulley is 6.30 inch diameter with a bolt circle of 2.25 inch. (1) Chrome Triple Groove Crankshaft Pulley. This crankshaft pulley is 7.80 inch diameter. Perfect for your off road, rock crawler, muscle car, street rod, Hot Rod, Rat Rod, Gasser, dune buggy, or sand rail project.