How do you Remove a Ford Golden Jubilee Ignition Switch (key switch)

I am trying to get my in-laws 1953 Ford Golden Jubilee tractor running. It is the same model that I grew up operating for my Grandpa. But I have not had much occasion to work on one before.

This one is stock, 6 volt system, negative ground. The keys have been lost. The local Napa had a big display of parts for old tractors, including a complete wiring harness for Fords. I picked up a new ignition switch, in hopes that I could just swap it out. But I am not sure how the original ignition switch was installed. The new one has a threaded body with a nut that goes all around it. I've attached a picture of the inside view of the old switch.

This is the key switch which controls power to the ignition coil. It is not the starter switch on the transmission which controls the starter solenoid.

Several more pictures. I am interested in the rectangular piece of metal with curled edges. Is that some kind of retaining clip?

And this is the new ignition switch. I've installed plenty of these with the nut that goes around the body of the switch. I wonder if it will fit in the hole.

Under the tachometer there is a terminal block. When the key is on, it completes the circuit between the two terminals. One could put a jumper on the terminals for testing purposes. I could wire my new switch in parallel with the old switch and mount it somewhere else. But I would like to put the new switch where the old one was.

The tractor needs transmission fluid. But the rims and tires are in decent shape.

Yes I am pretty sure if you grasp the slightly curved edge of the retainer and just pull it. It should have a u shaped cut out. Similar retainers on some automotive crank case filter breathers inside air filters and some brake hardware use the same type of retention. Since it looks like it is under tension with that rectangular piece it might be that you have to push it in and twist the cylinder if it doesn't have a cut out.

Yes, that clip holds the lock in place, its the same as a door lock retainer clip.
Perhaps spray with a penetrating oil and leave for a while.
It looks like an old key may be broken off it there.
They knock out with a flat screw driver, larger bladed one.