I just changed out my ignition switch. Bought a replacement made by Standard Parts at a local parts store. "Appeared" to be the same but not true. After much difficulty trying to get front bezel in I took all the wires off again and really looked at the original and the new one. After close examination they were not idenitical but with a small grinder I was able to remove a small section of the new one and it worked fine off the car. Putting it in the car was another story. No matter how hard I pushed in on the spring I could not get the bezel nut to go on. Finally I slightly chamfered the 2 tabs on the bezel and it went right together. The lock mechanism changed easily once I figured out it needed to be on "start" to come out.

Also my switches "acc" stud was not very long and I had to extend it with a 3/8" long piece of 1/4" tubing I tapped for a 10-32 then added a lengthof 10/32 all thread......Good Luck

In 40 yrs of working on these cars have never needed any tools to remove ig bezel, are you aware you need to push switch forward from behind dash and this allows bezel to rotate easily. try it and see if that helps.