Reading this 2 days after your post. You already rolling? I replaced mine thinking it was the reason for intermittent starts. Mine had more wires going to it than the Space Shuttle. Took lots of pictures before taking off wires. Agree with above advice from the guys on 4 post model, but if your universal does not fit, take the old one to NAPA. That is what I did with my old one. $45 and two days later I had exactly that back in my hands. Agree with keep the key option. You won't break another one.
Good luck.