What's the difference between hooking your heater hose from the heater core to the radiator or to the waterpump? When I took this thing apart originally it was hooked to the radiator and the waterpump was plugged. My buddies non serpentine setup goes from the heater core to the waterpump. I know that serpentine systems the waterpump runs the opposite direction, does that have something to do with how you decide to hook this up? My belt setup has been converted to serpentine.

http://i121.photobucket.com/albums/o219/ernestmayhand/Caprice%20resto/1756.jpg

Either will work, IMO. All cars I've had have the heater return line going to the water pump.