There are two bolts to the lever and two to the inner bracket. That is it, just be careful you don't break that inner bracket loose then you will be in some trouble.
https://www.flickr.com/photos/advance-design_parts_co/8129347797/in/set-72157631868452754
Get a long handle and come at them like this. I would suggest a good soak in penetrant oil first.
https://www.flickr.com/photos/advance-design_parts_co/8129368690/in/set-72157631868452754
Good luck!