RE: ignition??
You can take the ignition tumbler assembly out in less than a minute, providing you have a key that can turn it into the RUN (not START) position. The only thing holding it in the column is a single hardened steel lock pin. Ever look at the bottom side of your column and wondered what that extra little hole is next to the screw closest to the wheel? That's the pin access.
Turn the ignition to RUN, use a 1/8" pin punch in that hole, feel around a bit, then push in towards the center of the ignition tumbler. Using the key as a handle, draw the tumbler staight out without turning it out of RUN. When you install the new one, be sure it's in what will be the RUN position, push it gently in, and the first time you turn it back to lock, the pin will pop out and secure it.
It may be easier to take the lower shroud off to see the pin and hole in the ignition housing the first time you do it. If you cannot turn the tumbler with the key, you're in big trouble. Start thinking carbide drill bits and a lot of metal filings everywhere. If your tumbler is jamming intermittently, I'd change it now while you still have a chance!