waterpump pulley?

I hate to ask, but I not sure, on my valiant 66 225, no air, no tow package, it has a double pulley on the water pump. I think it should actually have a singe pulley on it, the reason I ask is because the fan will not fit in between the pulley and the radiator...it has an electric fan on it, however it's not wired through the ignition, and I know I will leave it on and drain the battery, it's not a question of if, it's one of when I will do it. which will obviously be the worst possible time, thank mr. murphy.
I am not home I am at work and can't take a pic, I will be able to do so tomorrow. Also if it is a single pulley, will one off of a 318 work? I know someone that has a pulley off of one. or if I can get measurements off the original I can check it against his pulley. Thanks guys, I know this seems like a dumb question, but of all the things I have done so far this is one I can't google up an answer for.