Here is the setup I use on my Duster. It seems to stay cool but I haven't tested it yet in hot weather. This is a custom version of the Doty pulley. I had him add a mounting ring on the backside of the pulley so I could bolt on a trigger wheel. That way the wheel is independent of the mounting surface so the pulley height doesn't change.

http://arengineering.com/products/efi-trigger-wheel-for-stock-water-pump/