Frank, The spacer would go between the hub of the water pump and the back side of the pulley not between the pulley and the fan blade. This would most like be a round collar with the center button in it so that we could have one water pump pulley that would fit all of the water pump lengths out there. If I didn't make it this way, I would have to make at least three different water pump pulleys to match up to the other pulleys. That is a problem today with all the different pump shafts out there. You get the wrong one and now your pulleys don't line up. Then the average guy goes nuts trying to find the right pulley or the right water pump. Right now I am just kicking around the idea. Nick Alfano Alfano Performance Date: Sun, 31 Jul 2005 21:56:44 -0400 From: farna@xxxxxxx Subject: Re: Any interest in reduction pulleys To: mail@xxxxxxxxxxxx Message-ID: <ADVANCES62ocJqj0CYi000012f3@xxxxxxxxxxxxxxxxxxxxxxx> I'd like to see some nice looking pulleys, not sure about reducing though. I don't quite follow the spacer collar idea though. Do you mean just spacers to go between the fan clutch/fan and water pump hub? If that's the case you'd need to replace the water pump with a short shaft model if you have a long one now. That wouldn't be to big a deal if you include the application and part number for the required pump. Water pumps aren't expensive and do wear out anyway.