Kit includes a cast aluminum double groove water pump pulley and double groove crank pulley, and a matched pair of belts. Has a 1:1 water pump/crankshaft speed ratio.
aluminum construction
Matched V-belts - 30-5/8" x 3/8" belts
1:1 to ratio
Fits Small Block V8 with '55-'68 short-style water pump with either a 5/8" or 3/4" shaft.
Note: The lower crank pulleys in our combo kits are manufactured thicker than normal stock pulleys. This requires longer 3/8" to be purchased separately. head type recommended.
Get the correct pulleys for your application by learning which water pump you have as explained in our tech article. .