I would loosen the bolt on the Z-bar bracket mounted to the frame and take the Z-bar/pivot bolt out together. This will make life easier when putting it back in with it already in the Z-bar. Yes, the Z-bar will slide out with the spring clip removed from the bellcrank side attachment pivot bolt.
I don't think grease zerks are needed if the seals have held up but if it's easy enough to do, then I don't see a problems.