Here is my set-up which I like because I never get any coolant in the driveway or on the truck. Original type set-up with a no-pressure cap. I also use a 160 degree thermostat which helped a lot in the summer verses the 180 that was in it.
http://www.flickr.com/photos/advance-design_parts_co/8129179135/in/set-72157631867396207