Steering Columns and Gear Boxs ? ! ? !

Howdy folks got a few questions about the steering column, shaft, gear box and all of that. I have a 1973 Dodge Dart Swinger .... and I was wondering how to separate the shaft from the gear box so I could pull the whole column out. I dunno what kind of steering box it is yet but plan to find out in the next few days. Got to clean off the half an inch of grease to get to the gear box yet so thats going to be a pain in the you know what. Also I was wondering if there is any other Mopar's gear boxs that could fit my Dart Swinger with a faster ratio. I was thinking about 15 :1 ratio if I can get it that quick. If not oh well I can live with the stock ratio. Its 20 : 1 isnt it? Thanks for reading and hope some one can help me with this. Remember MOPAR OR NO CAR!