26 inch Series 765 repairs

This piece is called a pivot bar. I recommend looking at our 26-040. I think this should work for you, though ours only has the one screw hole. That may not matter. You only need one screw hole to match up to install ours, so as long as it lines up for at least one of them then you should be good to go.

I'm afraid I can't answer that question. Sometimes the pivot bar screws right into the sash, sometimes it does need a housing. You'll have to look at your window and see what you're dealing with.