Water Pump Pulley Diameter: 6.40. Crank Pulley Diameter: 7.30. Power Steering Pulley Diameter: 5.75" 5/8" Keyed Shaft This will not work on early 265-283 with riveted on pulleys. To determine if your water pump is short or long. If your alternator is originally on the driver's side then it is a short water pump.
If your alternator is orginally on the passenger's side then it is a long waterpump. If you can fit your hand between the waterpump and the timing chain cover then you have a long waterpump.Powered by SixBit's eCommerce Solution. The item "SBC Chevy Chrome Steel Short Water Pump 2 Groove + Crankshaft Pulley 3 Groove" is in sale since Friday, December 19, 2014. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Engines & Components\Belts, Pulleys & Brackets". The seller is "motornets" and is located in Chino, California. This item can be shipped worldwide.