Auto Parts: 1982 s10 ignition, lock cylinder, strong spring

Question
wow... ok so my trucks been in the shop for 3 months, and it just got finished. i went to pick it up, put the key in the ignition and for some reason the ignition would turn almost all the way but not enough to make it turn over? and off course i pushed to hard and snapped the key off in the ignition.... classic right? i know the ignition is a cheap part but can you give me the steps on removal and replacement? or at least tell me where i could find them short of buying a repair book?

Answer
    Any good parts store will have both the lock cylinder (located behind the steering wheel, the part the key goes into) and the ignition switch (located under the steering column just in front of the pedals.  There is a little cover panel that comes off to expose the underside of the steering column.  Since it's an old truck, I would replace both parts; they shouldn't cost very much.  The lock cylinder is held in by a bolt, the steering wheel has to come off to get at it.  A steering wheel puller will be needed, if you can't borrow one, they cost about twenty dollars and can be used for other pulling jobs as well.  If you have a tilt steering column, then you will also need a special tool to depress the spring-loaded lock plate that keeps the wheel in position.  This is a very strong spring and, although you might be able to get the wheel off without the tool, you will never get it back on.  Once you've changed the lock cylinder (it comes with two new keys, if you want to you can get a locksmith to re-key it to work with your old key) you'll have to take care of the switch.
    Changing the switch is pretty easy, also.  The old switch is held in place with a couple of rivets, usually, and they will have to be removed, either by cutting off their heads or with a drill.  The new switch has a couple of elongated slots through which new screws will fit to fasten it in place.  sometimes they give you new screws with the switch, sometimes you have to go to a hardware store and find something to work; they need to be self-tapping sheet metal screws.  You will see that there is a rod that comes down from the lock in the steering head to the switch.  It plugs into a little slot in the switch.  The switch can then be adjusted by moving it up and down the column until all of the functions are occurring in the right spot, the starter works, etc.  Then you just tighten the new screws firmly and  you're good to go.  If you look under the steering column and find that there are screws there instead of rivets, then the switch may have already been changed once.  In this case, you may be able to adjust the existing switch to work fine with the new lock cylinder.  This isn't a real complicated job, especially if you don't have tilt wheel, and most of these old trucks didn't.