Help:Getting the original AC working

Hello, I would like to try and see if I could get my AC going again. It is in a 1973 Plymouth Duster. All the original components are there and have never been tampered with. It is very complete and all componets look very good. When I move the switches though nothing happens. And I really know nothing about ac. At first I didn't have power to the fuse for the ac blower motor but know I have power. It still doesn't kick on. I am not sure what to check. A little guidance would help. Do I need the ac belt on for the blower to kick on? Where do I need to check for power? Thanks