Ignition cylinder lock replacement: I need help.

I own a 75 Swinger that has been a driveway ornament for a couple of years ever since I lost it's only set of keys shortly after buying it. I bought a (repro?) ignition and door locks off of eBay, but I don't want to ruin the car's cherry interior with ham fisted ignorance. Can someone walk me through how to do this replacement so I don't break anything?
Author: admin