A local street rod builder gave me these GM part #'s. My local Chevy Dealer even let me look up parts in his original 67 dealer parts book , but all were discontinued years ago. These are very hard to come by, so if anyone needs Short Waterpump Bigblock 64-68 crank pulleys , here ya go : graemlins/hurray.gif

3744043 2 groove main pulley

3751232 1 groove inner pulley that fits inside the one above.

About 70.00 $ for the 2 at your local GM dealer graemlins/thumbsup.gif

These aren't secrect #'s all Corvettes use SWP Bigblock or Smallblock!! But thanks for sharing your tip graemlins/beers.gif