Vent window replacement 1967 Barracuda convertible

I guess the whole vent window and frame. I really don't know. By looking at what I got on e-bay it is the whole window and frame. I thought it was possible to remove and replace just the vent window and the lock but what I am seeing is that in order to do that you would have to loosen the two small screws in the door that hold the pin at the bottom of the vent window and I can't see any way to do that while the assembly is in the door. It was a real effort to loosen those two screws on the unit I bought and they were on my work bench.