1966 barracuda rear window regulator & door Assem?

1. Removing the lock cylinder from the ignition switch?
2. remove the heater suitcase from the dash, then pull all the clips that hold the two housing halves together.
3. Don't know, I use factory gauges.
1 yes I was told I had a matching set come to find out I have 3 different locks want to rekey to one lock.
2 take like an hour you think?