1969 Dodge Dart Ignition Assembly

Hello!

I have a 1969 Custom 4 Door Dodge Dart with a dash mounted ignition. I pulled the old one out (the one on the right) and was told it was an old model which explains why it turned 360 degrees when the key was inside due to it being a smaller ignition switch. Anyways… I ordered a 1969 Dodge Dart ignition switch (the one on the left) from a guy on this forum, and it doesn’t seem to fit just a new ignition lock cylinder. (Bottom right corner) Is there a part of the assembly that I am missing. I appreciate it.

thank you.

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