Yo!
If you search "horn", "turn signal", or "steering column" on this forum, you'll find my new pictorial. Check this link:
http://67-72chevytrucks.com/vboard/s...00#post3225400
A pic of the tool and step by step re-installation instructions are found there. It should answer any questions you might have.
"C" clip holds the lockplate in place. You may need a new one unless the old one popped out undamaged.
Please add any additional info you feel others might need to the linked post,...I hope it can be used as a data base for everyone in the future.
Thanks, Todd.