1966 barracuda rear window regulator & door Assem?

My left rear quarter glass widow regulator is completely rusted at the Top where the single bolt that hold the glass(assume it’s a single bolt) it rolls down maybe a inch before it feels rusty. The window is currently up I have everything off I’m at it but is it worth opening the can of worms? I don’t want to break the glass to get the window regulator out? Can I get one, of the glass or regulator? I removed my door cards to replace them. I dropped off the metal trim at the local chrome and polish. Which brings me to my second question I just bought the rod you screw your lock/ unlock button onto how does that connect to the key cylinder? I have matching cylinders all around and I’d like to use them but can’t find a ton of info on what components are in the locking system In the driver door of a 66. Thanks for reading any knowledge would help.