Trunk lock removal 76 Skylark

Hello. I’m new here. I was wondering if someone could tell me how to remove the trunk lock. Just the lock not the latch. Also, how difficult is it to take out a quarter window? Thanks in advance
 
The lock cylinder is held in the trunk lid by a clip-style retainer. The retainer is held in place by a screw or rivet.

Here are the instruction pages from the Fisher Body Service Manual showing the various layouts on the retainer.
 

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Your car would be a GM X-body in either the -17 hatchback coupe or -27 notch back coupe style. Instructions should be about the same for either style.

Three types of windows were used: standard fixed full-size window, optional swing-out full-size window, and optional fixed small formal window used with the landau vinyl roof.

Removal of the swing-out window is easiest. Disconnecting the hardware at the latch allows the window to swing out far enough that it can be lifted off the front hinges.

The fixed full-size window removes and installs from outside the car. The window is held in the body by a gasket which has to first be loosened from inside the car. Attached are instructions from the Fisher Body Service Manual. It notes the window moldings cannot be removed from the gasket unless the window is out of the car.

There are some examples on the Internet of how to replace this type. I Googled Nova quarter window replacement to bring them up. The 1975-79 fourth generation Nova uses the same body as your car.

Couldn't find much info on the small rear window type. It's probably similar except for the outer reveal molding and the vinyl roof.
 

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