Ignition Switch Replacement

I have seen several problems relating to the ignition switches....

I have the typical transmission problems, jumpy speedometer, ect. ect.

Just wondering since it looks like several people here have done this, could someone please tell me how to go about replacing this? Any detailed instructions would be GREATLY appreciated! I was also curious as to how long it takes to do this....

I have a 1994 K1500 with the tilt column

Thanks!