new old car needs a/c

just got a 69 dart custom, with what looks like factory a/c. the only component that i think is missing is the box that mounts under the dash with the vents. I pushed the MAX AC button and i could hear and feel air but it wasnt cold and there wasn't much volume of air. what can i do to check the a/c system myself without having to waste some freon? Oh when i push the button for a/c i don't hear the compressor making any noises like the sound it makes when it clicks on and off. could it just need a re-charge or a new compressor?
Author: admin