How do you change ignition switch in 1988 ford f350 ?

How do I open up the sterring colum,to get the ignition out ?How do you change ignition switch in 1988 ford f350 ?
try this site, lol



http://autozone.com/servlet/UiBroker?ForwardPage=/az/cds/en_us/0900823d/80/0a/39/35/0900823d800a3935.jsp

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