how to change keyswitch

hi,

i need the change the key switch on my dart to see if it is not supplying power to the ignition while cranking. It is a '70 Dart with a locking steering wheel, also is automatic with a column shifter. I disconnected the shifting lever and linkage in the engine bay when i put a hurst floor shifter in this winter.

I have another switch (came with the car) but i have no idea how to put it in. I looked at the new one and don't really see how to take it out, do i have to take part of the steering column apart? I'm hoping the chrome part that you see where the key goes in comes off and then it just slides out, but i can't tell.

Help!!

Thanks!

Steve