crank and water pump pulleys

I hope the pics come up properly. Like I said, alternator has a double pulley so, I thought it would be cool to run a double belt. Problem appears to be the double groove water pump pulley. Why would the alternator have a double pulley?

you have what looks to be the proper non a/c and power steering set up there. i don't think you'll find a wp pulley thats double groove and will line up with your crank and alt. pulleys.

if that extra pulley on the alt really bothers you jus get a single pulley put on to it.. the rear groove of the alt is in the same location as a single groove pulley