Can't disconnect my steering box??

You don't have to do anything except remove the one large pin to get the coupler off the box. They are often stuck/ rusted, use your imagination. Careful prying with a screwdriver/ small crowbar will usually move it up some, then stick a big end wrench or crescent in there to get more "purchase"

And of course, remove the column bolts 'n stuff, and "hang" the column temporarily with string/ wire from the dash so that it's free to move.